CN1131996A

CN1131996A - Type III pcmcia hard disk drive containing three disks

Info

Publication number: CN1131996A
Application number: CN 94192692
Authority: CN
Inventors: 爱伦·卡西欧; 卡特·布鲁纳; 哈罗德·比克罗夫特; 拉里·哈特希尔; 杰夫·里赫; 罗伯特·梅茨
Original assignee: Qualcomm Inc
Current assignee: Maxtor Corp; Qualcomm Inc
Priority date: 1993-07-08
Filing date: 1994-06-24
Publication date: 1996-09-25
Also published as: AU7213394A; EP0739528A1; BR9406937A; JPH09503605A; WO1995002247A1; CA2164858A1; AU689483B2

Abstract

A hard disk drive that contains three disks and complies with the type III PCMCIA specification.

Description

III type PCMCIA hard disk drive with three disks

The hard disk drive that the present invention relates to have three disks and meet III type PCMCIA technical standard.

The most computers system all has a mass-memory unit resemble the hard disk drive.Hard disk drive comprises the disk that can store a large amount of binary signals.Usually, disk is installed in one by on the motor-driven wheel hub (hub), and motor generally adopts electric rotating machine.Driver also comprises the magnetic head in a magnetization and induction disk magnetic field.Usually, magnetic head is positioned at an end that drives cantilever, and actuating arm can be around the bearing assembly rotation that is installed on the disk drive base plate.Actuating arm has a coil, it and the magnet cooperation that is installed on the base plate.Electric current by coil produces the moment of torsion that acts on cantilever, with respect to the disk moving head.Coil and magnet are commonly called voice coil motor or VCM.The actuating arm of conventional driver, motor is relative with other member be highly brittle a little less than, so be easy to be subjected to the excessive external impact load and the infringement of vibration.For this reason, hard disk drive all will be fixed on the cabinet of computer system with screw or other fastening method usually securely.

Hard disk drive computer program stored or other are to user's Useful Information.We are sought after sometimes these information are sent in another computer system and go.Usually these information transfer need be transmitted to floppy disk or by telephone wire from the hard disk convey program.These methods are very time-consuming, particularly under the situation that program is very long or data volume is very big.Some portable hard disk drive can insert in the expansion slot of computing machine.But in order to reduce the possibility that drive unit damages, it is very firm that the housing of driver and disk member all design.These firm members are very heavy usually, are not easy to use and carry.

Personal Computer Memory Card Internatio (CPMCIA) has been issued the technical standard of portable RAM (random access memory) card recently, and this RAM (random access memory) card can be inserted in the expansion slot of computing machine.The PCMCIA standard comprises the I type, II type and III type, and different models is distinguished according to the thickness of card.The memory size of computing machine can expand by inserting an additional card.Equally, system also can add modulating/demodulating card or FAX card by similar method.The standardization of these cards makes the user RAM (random access memory) card of a computing machine can be inserted another computing machine and needn't consider both model and pattern.

The size of standardized pcmcia card and credit card is close, has a connector that is complementary with computer connector.The small size of card provides a kind of easy to use and electronic component of carrying.The hard disk drive that a kind of PCMCIA of meeting standard preferably can be arranged, this disc driver can carry at any time and insert in the existing expansion slot of computing machine.This hard disk card must be very firm in to bear the greater impact load that acts on the driver.The mode that this card allows the user to resemble present use floppy disk is accumulated storage.

The hard disk drive member comprises the operation of a plurality of integrated circuit in order to Control Driver.These chips generally include one be installed in actuating arm on the read/write channel that links to each other with sensor.Read/write channel links to each other with an interface controller, and interface controller links to each other with main frame, interface controller with one at random memory device link to each other, this at random memory device as between main frame and disk the transmission data impact damper.

Disc driver also is included as the circuit that voice coil loudspeaker voice coil provides electric current, so that magnetic head remains on magnetic track middle (servo period) and magnetic head is moved on to another magnetic track (tracking cycle) from a magnetic track.In addition, disc driver also comprises the circuit to the motor rectification usually, guarantees the speed rotation with homogeneous of motor and disk.

The controller control based on microprocessor is used in the operation of foregoing circuit usually.Conventional disc driver also comprises an independent circuits that is used to connect controller and other circuit.This chip is commonly called glue and connects logic (glue logic).People such as Squires are in U.S. Patent No. 4,979, have announced a hard disk structure that has based on the controller of microprocessor, its middle controller control interface controller, read/write channel, the circuit of actuator and electric rotating machine in 056.The Squires system has adopted a kind of servo pattern of embedding.This pattern deposits servo-information in the same sector of one magnetic track as data.In each sector, the voice coil loudspeaker voice coil of processor Control Driver and the circuit of electric rotating machine.Processor adopting allow electric rotating machine and the control of voice coil loudspeaker voice coil and the system that the transmission of data is carried out simultaneously between main frame and disk.Though the system of Spuires type has proposed the system based on controller, improved the efficient of data transmission between main frame and disk, this system needs a large amount of electronic components usually, and they must be installed on the printed circuit board (PCB).

People such as Morehouse are in U.S. Patent No. 4,933,785 and people such as Stefansky in U.S. Patent No. 5,025, announced that printed circuit board (PCB) is installed in the conventional hard disk drive in the actuator housing in 335, be called as HDA.HDA normally seals, and comprises disk, actuating arm and electric rotating machine member.HDA also comprises a prime amplifier that links to each other with drive head.Remaining electronic component (interface controller, read/write channel, driving circuit etc.) is installed on the outside printed circuit board (PCB).The length of printed circuit board (PCB) is identical with HDA with width.Therefore the thickness of whole assembly is by HDA thickness, and the height of P.e.c. plate thickness and electronic component determines.

By the same assignee's who transfers the application the U. S. application No.07/975 that submits on November 13rd, 1992, the hard disk drive that has proposed to have 1.8 inches disks of a diameter and met III type PCMCIA standard in 008.Patent with Morehouse and Stefansky is the same, and above-mentioned application comprises a printed circuit board (PCB) identical with width with HDA length.

The capacity of driver can expand by add additional disk in actuator unit.Every disk all has a pair of and the corresponding magnetic head of its face.For the height of laying magnetic head is provided, adjacent disk separates by the pad that is installed on the motor wheel hub.Therefore, the thickness of many disc drivers is circuit boards, the function of housing and disk spacing.

Preferably can provide to have three disks, and meet the hard disk drive of PCMCIA standard.Using common technology is to require to lay in the space three disks at PCMCIA, therefore is necessary to propose to meet three disk hard disk drives of PCMCIA standard.

This invention relates to the III type PCMCIA hard disk drive with three disks.This disc driver comprises a small-sized electric rotating machine that is used to rotate a disk.The rotation of electric rotating machine is by the electric rotating machine circuit control that contains servo ic.Disk rotates with respect to an actuating arm assembly, and actuating arm has the sensor that is used for from the disk access data.Actuating arm is by the voice coil loudspeaker voice coil rotation of the driving circuit control that has servo ic.

Disc driver has a shell and can make driver insert the connector of main frame.Signal converter links to each other with the read/write chip, and the read/write chip is by data management chip transmission information between main frame and disk.The data management chip, the read/write chip, servo ic is controlled by control chip.All electronic components of driver are installed on the printed circuit board (PCB).1/3 of the nearly shell length of circuit board is between disk and connector.The minimizing of length allows circuit board to be in identical plane with disk, therefore can not increase the thickness of whole assembly.Compact assembly provides a kind of multitask disc driver of the III of meeting type PCMCIA thickness requirement.

Therefore, the present invention aims to provide a kind of three disk hard disk drives of the III of meeting type PCMCIA standard.

The present invention also aims to provide a kind of circuit that reduces the printed circuit board sizes of hard disk drive (HDD) assembly.

Various purpose of the present invention and advantage will be described in detail hereinafter in conjunction with the accompanying drawings, and these figure comprise:

Fig. 1: the skeleton view of hard disk drive of the present invention;

Fig. 2: the top plan view of hard disk drive;

Fig. 3: the backplan of hard disk drive lid;

Fig. 4: the sectional view of actuating arm assembly;

Fig. 4 a: embodiment sectional view with hard disk drive of four disks;

Fig. 5: the hard disk drive sectional view of signal driver printed circuit board (PCB) and connector;

Fig. 6: the sectional view of electric rotating machine;

Fig. 7: the backplan of printed circuit board (PCB);

Fig. 8: the system architecture synoptic diagram of disc driver;

Fig. 9: system data managing chip synoptic diagram;

Figure 10: system's servo ic synoptic diagram;

Figure 11: the expression of a sector in the disk;

Figure 12: the synoptic diagram of system control chip;

Figure 13: the synoptic diagram of system R/W chip;

Figure 14 a-g:: disc driver operational flow diagram.

By label in further detail with reference to the accompanying drawings, Fig. 1 has shown hard disk drive 10 of the present invention.Disc driver is designed to a card, can insert the main frame (not shown).Hard disk drive 10 comprises a housing 12 and connector 14.In the optimum implementation, the size of housing is 85.6 * 54.0 * 10.5mm.This size conforms Personal Computer Memory Card Internatio (PCMCIA) III type electronic cards technical standard.PCMCIA is the tissue of a distributing electronic card technique standard, comprises size and some other requirement in the standard.The computing machine that meets the PCMCIA standard all has the slot that can insert standard card.Under this standard, the electronic cards of a computing machine can be inserted in another computing machine at any time, and need not the model and the pattern of taking into account system.The PCMCIA standard can write away for, and the address is Personal Com-puter Memory Card International Association, 1030 G East DuaneAvenue, and Sunnyvale, California 94086.

The PCMCIA standard comprises different three types of thickness.I type card thickness is approximately 3.3mm, and II type card thickness is approximately 5.0mm, and III type card thickness is approximately 10.5mm.Computing machine has one group of adjacent slot, and the width of slot allows to insert an II type card.I type and II type take a slot, and the III type takies two slots.All computer slots comprise that all a kind of being installed in is used for 68 pin connectors that computer system connects on the motherboard.The PCMCIA standard is at first for comprising that modulatedemodulate tuned plate and fax internal memory such as plate or logic card set up.The present invention proposes the hard disk drive that meets III type standard.

In optimum implementation, the card assembly 10 connector 14 have with computing machine on 68 68 pipe boxes that the pin connector is complementary.Connector 14 is made by dielectric substance, has one group of pipe box 16 that the pin (not shown) with computer connector is complementary.The pin of connector specify be used for power supply, and data.The PCMCIA standard-required be used for ground pipe box longer than the pipe box that is used for power supply.Permission being set blocking and insert ' work ' system moving and can not cause voltage spike like this.

With reference to figure 2-7, hard disk drive comprises the disk 18 by three separation of electric rotating machine 20 rotations.Though only show and described three disks, we find that hard disk drive of the present invention also can install four disks and meet III type PCMCIA standard.Disk 18 is made with metal, glass, pottery or other compound substance by proven technique, is covered with magnetic film on it, and as shown in Figure 6, the wheel hub 22 of electric rotating machine 20 links to each other with spindle magnet 24 by a pair of conical surface bearing 26.Have in the wheel hub 22 stator 28 with one group with wheel hub 22 inside surfaces on the coil 30 that acts on mutually of magnet 32.Electric current by coil 30 produces the magnetic line of force that passes magnet 32, causes the rotation of wheel hub 22 and disk 18.Wheel hub 22 has a pair of corresponding cone-shaped inner surface 34 that slides on the conical surface 36 of conical bearing 26.Between cone hub surface 34 and bearing 26, a liquid lamella is arranged, be used to reduce the spin friction between parts 22 and 26.One space 38 is arranged in order to store bearing liquid between conical bearing.Preferably a kind of iron content fluid lubricant of bearing liquid can be retained between wheel hub 22 and the bearing 26 by the magnetic field of spindle magnet 24.Conical bearing makes the exterior contour of electric rotating machine 20 very little, and electric rotating machine 20 can bear the common impact load that acts on handheld computer or the disc driver.Disk 18 is fixed on the wheel hub flange face 40 by clamp device 42.Disk 18 is separated by the pad 43 that is positioned at 18 of disks.Disk chucking device 42 is preferably made by thermoplastic material, is melted on the motor 20 with ultrasonic method.In the groove 44 on the thermoplastic material inflow wheel hub 22.Plastics in the groove 44 prevent the moving along the z axle of disk 18.The part of clamp device 42 also flows between the internal diameter of top disk of disk 18 and the wheel hub 22 and prevents that the periphery of all disks 18 from moving.

There are a pair of

cover

45 and 46 in fixing main shaft 24 two ends.End cover 45 is fixed on the base plate 48 by layer of adhesive 50.In optimum implementation, adopt Min-nesota Manufacturing ﹠amp; The AF46 bonding agent that Mining Co. (3M) sells.Bonding agent 50 also is used for being connected of lower taper bearing 26 and end cover 45.Overhead guard 46 is installed on the stator 24.In optimum implementation, cover 46 and lid 52 connect together by being contained in the viscoelasticity membrane material 54 that covers above 52.Viscoelastic material 54 eliminates motor 20 height and base plate 48 and covers the tolerance in space between 52.Viscoelastic material 54 also can weakening effect in the shock and vibration load of motor 20.

As shown in Figure 2, disk 18 is with respect to 56 rotations of an actuating arm assembly, and actuating arm is equipped with the sensor 58 that is commonly referred to magnetic head.Each sensor 58 all contains a coil (not shown), the magnetic field of its magnetizable and induction disk 18 each corresponding adjacently situated surfaces.Each magnetic head 58 is all supported by a flexible arm 60 that is connected in actuating arm 62.In optimum implementation, flexible arm 60 is made by one or more current-carrying plate (not shown)s, and current-carrying plate separates with having certain flexible dielectric substance (not shown).The current-carrying plate conduction sends to the signal of signal converter 58.Magnetic head 58 also comprises a slide block (not shown), and it forms air cushion between disk and magnetic head under disk 18 swirling eddy ground effects.This layer air cushion makes magnetic head 58 leave the surface of disk 18.It is very soft that flexible arm is made, just it can be separated from magnetic disk surface down to air cushion, thus the axial deviation of permission disk 18 and motor 20.Magnetic head 58 is made into to do horizontal recording can do perpendicular recording again.

Blended rubber is bonding in the slot of flexible arm 60 insertion actuating arms 62.As shown in Figure 4, preferably each arm 62 can have two flexible arms 60.In optimum implementation, bonding agent end agent, thermal source, ultraviolet ray is cured.The silit manufacturing that actuating arm 62 is handy the lightest and solid.Actuating arm 62 rotates around bearing assembly 66.As shown in Figure 4, bearing assembly 66 comprises the bearing seat 68 that is stretched out by base plate 48.With reference to figure 2, actuating arm 62 has a triangle ball bearing 70 that stretches in the bearing seat 68V shape groove 72.Under the effect of C shape spring 74, ball bearing 70 contacts with bearing seat 68.The summit of ball bearing 70 contacts with the summit of groove 72, when actuating arm 62 when bearing assembly 66 rotates, bearing bearing seat 68 rollings relatively.Ball bearing of the present invention has proposed a kind of bearing assembly of low profile, and it has less relatively frictional resistance, can bear the typical impact load that acts on hand-held hard disk drive by structure.

There is a magnet 76 to place between a pair of stationary coil 78 in the bottom of actuating arm 62.Magnet has the arctic (N) and the South Pole (S), and therefore when electric current passes through coil with certain direction, the arctic will be subjected to an acting force vertical with coil, and when sense of current is opposite, the South Pole will be subjected to equidirectional acting force.Magnet and coil are commonly called voice coil motor or VCM80, their rotations actuating arm 62 and magnetic head 58 relative with disk 18.As shown in Figure 4, coil 78 is installed in the C shape mask frame 82, and mask frame is made with Ferrite Material, can provide the loop for the magnetic line of force, the magnetic line of force is remained in the zone of voice coil loudspeaker voice coil 80.

Shown in Fig. 2 and 5, connector 14 is at an end of housing 12, and is fixing by the groove surface on base plate 48 and the lid 52 84.Groove surface 84 stops connectors 14 to move on respect to the direction of casing 12 any.All pipe boxes 16 of connector all have lead-in wire 86, and these wire bonds are on the conductive contact 88 of printed circuit board (PCB) 90 (PCB).As shown in Figure 4, printed circuit board (PCB) 90 is fixed on the base plate 48, wherein comprises the required whole electronic components of disk drive components 10 operations.

As shown in Figure 7, be installed in and on the printed circuit board (PCB) 90 control chip 92, read/write channel chip 94 and servo ic 96 arranged.All chips all are packaged into integrated circuit, are welded on the printed circuit board (PCB) 90 with the technology of routine.As shown in Figure 2, the reverse side of circuit board 90 comprises data management chip 98, preposition amplification chip 100 and ROM (read-only memory) (ROM) 102.Circuit board 90 also comprises the required passive device of formation actuator assembly electronic system, as resistance 104, electric capacity 106.Circuit board 90 is between disk 18 and connector 14.As shown in Figure 5, printed circuit board (PCB) 90 is arranged in the substantially parallel plane of disk 18.Circuit board 90 and disk 18 basic coplanes have reduced the integral thickness of actuator assembly.

As shown in Figure 2, printed circuit board (PCB) 90 links to each other with actuating arm assembly 56 by flexible PCB 108.Flexible PCB 108 is that the polyimide of KAPTON is made with trade mark usually, and it has encapsulated whole lead.One end of flexible PCB 108 has with melting welding or is ultrasonically welded within contact 110 on the flexible arm 60.As shown in Figure 5, an other end of circuit board 108 is pressed on the printed circuit board (PCB) 90 with the holddown belt on the cover plate 52 116, can effectively contact with corresponding contact.When cover plate 52 was installed on the base plate 48, the contact of 116 pairs of flexible PCBs 108 of holddown belt applied a pressure.Holddown belt 116 provides a kind of method that flexible PCB 108 is connected/disconnects with printed circuit board (PCB) 90 and need not to weld two parts.As shown in Figure 2, disk drive components also comprises coil 78 flexible wires 126 that connect printed circuit board (PCB) 90 and voice coil loudspeaker voice coil 80, and the flexible wire 128 that connects printed circuit board (PCB) 90 and electric rotating machine 20 coils 30.Flexible wire 126 is contacting with corresponding contact on the printed circuit board (PCB) 90 under the effect of holddown belt 116 with 128 contact.

Shown in Fig. 3 and 4, on the lid 52 resilient seal 122 that is compressed on base plate 48 respective face 124 is housed.Elastic body 122 is with disk 18, and electric rotating machine 20 and actuating arm assembly 56 are sealed in the zone that is commonly referred to HDA126.Cover plate 52 links to each other with base plate 48 by securing member 128.Many spring adjustment sheets 130 are arranged on the securing member 128, and these adjustment sheets stretch in cover plate 52 and the base plate 48 corresponding grooves 132.Securing member 128 has an elastic webbing 134, is used for external impact and the oscillatory load of absorption on disk drive components 10 peripheries.Disc driver 10 is placed in the main frame usually, and therefore the limit of card is being supported by cabinet.Any shock and vibration load that acts on computing machine all can be passed to disc driver through the limit of driver.Elastic webbing 134 has weakened these loads, and the operation of protection driver is not damaged or interrupts.Securing member provides a kind of and need not screw or other suitable fastening means and connect the method for base plate 48 and lid 52.Do not use threaded fastener to help to reduce the whole height of assembly.Shown in Fig. 2 and 3, lid 52 has a rectangular pin 136, thereby it can insert

member

48 and 52 is alignd.

Base plate 48 has the filter chamber 140 of a band air strainer 142, and air strainer places the outside of HDA126.Base plate 48 has a groove 142 that is used for air-flow exchange between HDA126 and the chamber 140.When the air pressure of HDA126 inside was lower than the pressure of driver 10 external environment conditions, different pressure made air pass through securing member 128, flow through cover 52 and base plate 48 connect face and enter HDA district 126 and base plate 48.Gas between HDA district 126 and the filter chamber 140 can circulate mutually.The air that enters HDA126 all will pass through filter chamber 140.Hydrocarbon, sour gas and other airborne impurity will be filtered device 142 and remove.Air strainer can also comprise a humidity controlling unit.

Disk drive components 10 also comprises a recursive filter 146 of removing impurity among the HDA.Recursive filter 146 is in the centre of chamber, and this chamber and HDA tunicle 146 are separately.Filtrator 146 separates upstream chamber 150 and downstream chamber 151.The steering current that rotatablely moves of disk 18 enters upper chamber 150, enters lower chamber 151 by filtrator 146, returns the HDA district 126 of disk 18 again.Disc driver can also comprise the environment Control Component of being made by the material of absorption hydrocarbon, sour gas and a moisture 180.

Fig. 8 has shown the synoptic diagram of hard disk drive (HDD) assembly 10 system architectures.The operation of this system's control disc driver.On the disk 18 that data usually are stored in along the annular orbit that with the disk diameter is the center.In optimum implementation, the diameter of disk is 1.8 inches.Though only described 1.8 inches disk here, clearly the present invention also can use 1.3 ", 2.5 ", 3.5 " waits the disk of other diameter.For 1.8 " disk, the store data of native system 130 magnetic tracks on each disk face.Each magnetic track comprises one group of servo sector.The data of 768 bytes can be stored in each sector.The capacity of one three disk pack unit is 390 megabyte, and the capacity of one four disk pack unit is 520 megabyte.

As shown in Figure 8, system 10 comprises data management chip 98, control chip 92, servo ic 96 and read/write (R/W) chip 94.System also comprises the ROM (read-only memory) (ROM) 102 that links to each other with control chip 92, with the pre-amplification circuit 100 that links to each other with R/W chip 94 with magnetic head 58.Controller 92 links to each other with R/W chip 94 with servo ic 96 respectively with 206 by string line 204.Controller 92 links to each other with data management chip 98 by address/data bus 208, links to each other with ROM102 by instruction bus 210.Data management chip 98 links to each other with main frame 212 by address/data bus 214, links to each other with R/W chip 94 by data bus 216.R/W chip 94 links to each other with preposition amplification chip by line 218.Servo ic 96 links to each other with R/W chip 94 by servo line set 220.Servo ic 96 also links to each other with electric rotating machine 20 with voice coil loudspeaker voice coil 80 with 224 by line 222.Preposition amplification chip 100 links to each other with magnetic head 58 by line 226.Controller 92 also links to each other with R/W chip 94 by raw data line 228.String line and address/data bus also are included in the necessary signal wire of transmission information between the different chips.Though in this explanation, used this term of line, be readily appreciated that comprised in the term line multi-thread.

As shown in Figure 9, data management chip 98 links to each other with main frame 212 by interface control circuit 230.Hardware by providing handshake consistent with host protocol etc. and main frame 212 to get in touch is provided interface control circuit 230.In optimum implementation, interface controller 230 meets the agreement of PCMCIA.Interface controller 230 links to each other with random access memory (RAM) 232 by data bus 234.RAM232 provides buffer memory for the data of transmission between main frame 212 and disk 18.In optimum implementation, the capacity of RAM is 4Kbytes.Wherein 3.5Kbytes is generally used for being stored in the data of transmitting between main frame and the disk.Remaining 0.5Kbytes is specifically designed to some predetermined disc driver characteristic information of storage as high-speed cache.After disc driver assembled, the various characteristics of driver element had just been determined and has been left on the disk.After disc driver powered up, controller was carried out initialize routine.The part of program is to read the characteristic information of driver and leave same content the cache part of RAM in from disk.

236 couples of RAM232 of memorizer control circuit manage, and the address is provided and provides drive control signal by line 240 for storer 232 by address bus 238.Memorizer control circuit 236 by line 242 from the interface control circuit request of accepting the interview.Control circuit 236 also by line 246 from disk control circuit 244 request of accepting the interview.Disk control circuit 244 provides interface between data management chip 98 and R/W chip 94.Disk control circuit 244 receives read by line 248 from interface circuit 230, and interface circuit is read and write select lines 250 and 252 a relaying on the R/W chip 94.Interface, storer and disk control circuit also link to each other with control chip 92 with 258 by line 254,256.

Between memory controller 236 control RAM232 and the interface control circuit 230, between RAM232 and the disk control circuit 244 and the data access between control chip 92 and the data management chip 98.RAM232 links to each other by exclusive data bus 208 with control chip 92.When control chip 92 is want when RAM232 carries out access, control chip sends address and data managing chip sheet choosing (DM-CS) control signal.

For data being write disk 18, originally main frame 212 provides a write request of being accepted by interface control circuit 230, and it carries out necessary hand shake procedure.Interface control circuit 230 produces a requirement writes logical address and data memory buffers 232 from main frame access request to memorizer control circuit 236.Storage control circuit 236 deposits these data in buffer memory 232 according to storage mapping.Interface control circuit 230 produces a HOSTINT look-at-me that is sent to control chip 92.

Receive after the HOSTINT signal, control chip 92 request access RAM232 are so that the logical address that is provided by main frame to be provided.Control chip 92 is converted to the physical disk address with logical address.Tracking program of control chip 92 initialization moves on to magnetic head the correct position of disk 18.To measure converter 58 when voice coil loudspeaker voice coil 80 and move on to required disk sector, control chip 92 provides a Z sector signal to data management chip 98.One receives Z sector signal, and disk control circuit 244 sends a data access request to storage control circuit 236.The sequence on the disk 18 is write in initialization one to storage control circuit 236 by corresponding contents among the RAM232 is placed bus 216.

Be reading of data, main frame 212 sends the request of reading that is received by interface control circuit 230.Desired logical address leaves in the buffer memory 232.A HOSTINT signal is produced, and logical address Be Controlled chip 92 reads.Control chip 92 is actual disk sector with physical address translations, correspondingly produces a tracking program driving arm.Be positioned at when signal converter on the correct position of disk, control chip 92 sends a Z sector signal to data management chip 98.Disk control circuit 244 sends memory access requests to storage control circuit 236, to start RAM232.Data are sent to buffer memory 232 by disk control circuit 244 from R/W chip 94.Storage control circuit 236 is sent to main frame 212 with data from RAM232 by interface control circuit 230.

As shown in figure 10, servo ic 96 comprises voice coil loudspeaker voice coil control circuit 270 and the electric rotating machine control circuit 272 that is respectively applied for driving voice coil loudspeaker voice coil 80 and electric rotating machine 20.Servo ic 96 links to each other with control chip 92 by two-way 16 bit synchronization serial ports 274.Serial ports 274 links to each other with a D/A (DAC) by line 278.DAC276 comprises 280, one voice coil loudspeaker voice coil DAC of electric rotating machine DAC port mouth 282 and a mould/number (Ad) DAC port 284.

The voice coil loudspeaker voice coil port provides Vvcmoffset by line 288-292 to voice coil loudspeaker voice coil control circuit 270, three signals of Vvcmtrack and Vcm gain margin.These three signal additions in adding circuit 294.The Vvcmoffset signal provides bias voltage for voice coil loudspeaker voice coil 80.The Vvcmtrack signal is a secondary voltage signal, and it can change the drive signal that bias voltage makes its more accurate control voice coil loudspeaker voice coil 80.Vcm gain margin signal is another secondary signal, and it can improve the resolution of offset signal, and the servo period at driver uses usually.The size of Vcm signal is sent to the 8 comparing datas decision of voice coil loudspeaker voice coil port 280 by two-way serial ports 274 by control chip 92.These data commands are made of 7 bit addresses and 1 read/write bit and are decoded by serial ports.According to the content of 7 bit addresses in the data command, data are sent to suitable DAC port.

Adding circuit 294 sends signal to the operational amplifier 296 that biasing is provided for drive circuit 298.Drive circuit 298 links to each other with the coil 78 of voice coil loudspeaker voice coil with VcmN302 by pin VcmP300.Voice coil loudspeaker voice coil control circuit 270 also comprises a current sensor 304, and it feeds back to operational amplifier 296, for the electric current of supplying with voice coil loudspeaker voice coil 80 provides direct Current Control.

Electric rotating machine port 280 provides Vspnoffset by line 306-310 to electric rotating machine control circuit 272, Vspntrack and Vspn gain margin signal.The electric rotating machine circuit that receives these signals comprises and voice coil loudspeaker voice coil circuit 270 essentially identical members, 316, one current sensors 318 of 314, one drive circuits of 312, one amplifiers of an adding circuit.Adding circuit sums up Vspin () signal as mentioned above.With the voice coil loudspeaker voice coil signal similar, offset signal provides bias voltage, and other signal is adjusted bias voltage.Drive circuit 316 links to each other with the line group of electric rotating machine by pin A, B, C on the line 320-324 respectively.Drive circuit 316 is received the switching signal that control chip 92 is provided at the Vcomm line by 326 controls of stator steering logic, and the stator steering logic is the suitable combination of enable driver sequentially, and these have driven device and have had lead-in wire A, B, C respectively.Whenever a switching signal is provided, steering logic 326 sequentially enables correct driver, and electric current will offer electric rotating machine according to the suitable combination of line A, B, C like this.

Electric rotating machine control circuit 272 have one with line A, B, C and motor center tap (CT) the lead-in wire 332 back electromotive force sensors 330 that link to each other.Sensor 330 is used for comparing with reference voltage for comparer 334 provides back-emf signal.Comparer 334 provides Vphase signal by line 336 to control chip 92.Control chip 92 utilizes the Vphase signal by Vcomm line 328 conversion electric rotating machines 20.In optimum implementation, drive circuit 316 also comprises additional Sp-nGa, SpnGb and SpnGc signal, and they can link to each other with additional driver and offer the level of motor with increase.These characteristics make servo ic 96 can be used to contain additional disk, need the disc driver of bigger torque.

Servo ic 96 has an analog multiplexer 338 that receives varying input signal.Signal is switched to A/D converter (ADC) 340, and it has utilized the D/A switch circuit of DAC converter 276.The ADC converter comprises serial that a comparer 342 and one can produce 8 Bit data strings register (SAR) 344 one by one.

During operation, multiplexer 338 provides a simulating signal to comparer 342.SAR344 produces 8 bit words in proper order, and is sent to AD DAC port 284 and converts the simulation comparison signal to.The simulation comparison signal is with comparing from the simulating signal of multiplexer 338.The most significant digit of first word is changed to 1, and all the other are 0.If most significant digit is greater than simulating signal, then one 1 is output to serial ports 274.SAR344 produces next 8 bit words and converts simulating signal again to and 342 comparisons of bit device.The next lowest order of new word is changed to 1.This operation is performed until the size that 8 comparands that offer serial ports 274 can be represented simulating signal.Then serial ports 274 hereby data deliver to control chip 92 by string line 304.

Multiplexer 338 passes through line 346 and 348 respectively from back electromotive force sensor 330 and current sensor 318 received signal Vbemf and Vispn.The A-B and the C-D servosignal that come from R/W offer multiplexer 338 by line 350 and 352.The output signal Vivcm of voice coil loudspeaker voice coil current sensor 304 offers multiplexer 338 by line 354.These feedback signals are transferred to control chip 92 by ADC340 and serial ports 274.

Voice coil loudspeaker voice coil control circuit 270 will be with respect to magnetic head 58 location of disk according to the order from control chip 92.Control chip 92 and control circuit 270 are according to tracking cycle or servo period driving arm.In cycle, magnetic head 58 moves to another track location from first track location at tracking.In servo period, sensor 58 will be maintained at the center line of magnetic track.

In optimum implementation, disk 18 comprises the servo-information of embedding.Figure 11 has shown exemplary sector in the magnetic track.The initial servo region that comprises in each sector is thereafter the ID district.The ID district comprises the header address that identifies the sector.Immediately following the ID district is data field and information of check code.After the ECC is another ID district, and it has indicated next data field D1, and the partial data among the D0 of data field is arranged among the D1.

It is read/write district and automatic gain control (AGC) district that servo region begins, and one section does not have data (DC gap) thereafter.The DC gap is a synchronizing pulse at last.Servo region also comprises one in order to the Gray code of the place cylinder (magnetic track) of indicating this sector and one group of servo bursts A, B, C, D.Servo bursts A and B have a limit to be in the center line of magnetic track.Servo bursts C is in the center line of magnetic track on the even number magnetic track.Base of servo bursts D is in the top margin of C.By reading the size of servo bursts, can determine the position of magnetic head phase center line.The AGC district is in order to set the reference voltage of servo bursts.

Synchronizing pulse is first voltage jump that the AGC district was detected after afterwards predetermined some no saltus step clock period.For example, after signal converter detects the AGC district, detect before the synchronizing pulse, arranged three clock period without any voltage jump.Another scheme can provide a voltage jump as synchronizing pulse in that Gray code is initial always.

Figure 12 has shown the synoptic diagram of the control chip 92 that comprises core microprocessors 360.In optimum implementation, microprocessor is the remodeling of the DSP TMS320C25 processor of Texas instrument company.Compare with the controller of common some hard disk drives, as the control chip 80C196 of Intel, processor 360 has less instruction set.The minimizing of instruction set has reduced the access requirement to storer.Processor 360 has RAM storer (not shown).Conventional RAM storer will use under the 5.0V nominal voltage.A kind of hard disk drive that can move under the 3.3V nominal voltage preferably is provided, and this is the voltage standard that a portable computer adopts usually.Conventional RAM storer is slow under than the situation at 5.0V to the processor access request responding when 3.3V.Lower RAM speed has reduced performance of processors.Use only needs the processor of less access request can design a system that operates in 3.3V and can obviously not influence processor performance to a given function.

The DSP microprocessor has two internal bus (not shown)s that are separated that are used to transmit data and instruction.Dual-bus structure allows processor to get finger concurrently, decode, read and executive routine.The characteristics of DSP streamline have greatly improved performance of processors.Having in the dsp processor can again can be as the internal memory of RAM as register.

Controller chip also comprises the built-in support hardware of linking on the processor 360.Support hardware comprises one by string line 204 and the 206 two-way 16 bit synchronization serial ports 362 that link to each other with R/W chip 94 with servo ic 96.Serial ports 362 also links to each other with processor 360 by bus 364.Serial ports 362 has the register as buffering between processor 360 and chip 94 and 96.362 mouthfuls of addresses that provide according to processor 360 provide chip selection signal for R/W chip 94 and servo ic 96.Serial ports 362 links to each other with a register file 366.

Controller chip 96 comprises a state machine 368, writes inhibit circuit 378 comprising 370, one servo gating circuit 374, one auto-gain circuits of 372, one train of impulses demodulator circuits of a Gray code circuit (AGC) circuit 376 and one.Train of impulses demodulator circuit 374 is by the operation of line 380 other circuit of control.Train of impulses demodulator circuit 374 links to each other with timing circuit 382 by line 384.Gray code circuit 370 and train of impulses demodulator circuit 376 all pass through raw data line 228 and receive raw data from R/W chip 94.

Timing circuit 382 comprises some timers, one of them before the servo pulse of a sector then.Current servo timer then, timing circuit 382 provides AGC signal by line 386 to agc circuit 376.AGC signal enabling agc circuit 376, agc circuit start the automatic gain control circuit of R/W chip 94 by line 388.Timing circuit 382 also sends request signal by line 384 to train of impulses demodulation 374.Request signal enabling pulse string demodulation 374 beginnings are sought synchronizing pulse in the servo bursts of sector.One receives request signal, and when in the clock period at predetermined quantity the signal saltus step not taking place (raw data that comes from line 228), train of impulses demodulation 374 enables an inner sync mark district.The back has produced saltus step in preset time if should sync mark district, inside be enabled, and train of impulses demodulation 374 produces one and shows the H sector signal that detects synchronizing pulse.

H sector signal offers Z sector circuit 392 by line 394, and offers processor 360 by line 390.The Hsec-tor signal that comes from train of impulses demodulation 374 is provided with a pair of timer in the Z sector circuit 392.When a timer then after, Z sector circuit 392 provides a Z sector signal for data management system 98 and R/W chip 94 by line 258.What a timer is used for each D0 and D1 district.Ifs circuit 392 is started by starting line 396 by processor 360, and then Z sector circuit 392 can only produce a Z sector signal.

After detecting synchronizing pulse, train of impulses demodulation 374 starts Gray code circuit 372.Gray code circuit 372 comprises the shift register of the Gray code that storage is provided by raw data line 228.Gray code leaves in register file 336 specific addresses by bus 398 and is used for reading with preprocessor 360.The detection of synchronizing pulse also is provided with a train of impulses demodulation 374 timer internals.Arrive when the time of timer, train of impulses demodulation 374 is forbidden Gray's decoding circuit 370 and is started servo gating circuit 372.Servo gating circuit 372 sends a series of two signals by line 399, makes the internal circuit of R/W chip 94 provide A-B and C-D signal to servo ic 96.A-B and C-D signal are given register file 366 by ADC converter 340 and serial ports 274 and 362.

When timer 382 generation request signals, train of impulses demodulation 374 also starts writes inhibit circuit 378.Start line 252 from writing of data management chip 98 and link to each other with prime amplifier 100, write inhibit circuit 378 like this and can forbid write signal and stop data are write on the disk by writing inhibit circuit 378.Write inhibit circuit 378 and during servo pulse, forbid write signal, to prevent that any data-signal is write servo region.Writing inhibit circuit 378 can also be enabled by line 400 by the vibration transducer (not shown).If disc driver quickens to have surpassed predetermined value, vibration transducer will produce enable signal.Vibration transducer and write inhibit circuit 378 and prevent from when driver is subjected to undue oscillation, to carry out data and write.

Controller chip 92 comprises one by

bus

404 and 406 interface modules 402 that link to each other with register file 366 with processor 360.Interface module 402 provides the storage mapping between processor 360 and the register file 366.Interface module 402 allows built-in support hardware to link to each other with dissimilar processor.Interface module 402 links to each other with demoder 408 by line 410.The address that demoder 408 decoding processors 360 provide, enable pass is crossed the chip selection signal ROM and the DM of

line

412 and 256 gating ROM102 or data management chip 98.

Controller chip 92 also comprises an oscillator 412 by line 414 receiving system clock signals.Oscillator 412 provides clock signal by line 418 to clock circuit 416.Clock circuit 416 is a R/W chip 94 by line 420-428, data management chip 96, and servo ic 96, the support hardware of microprocessor 360 and controller 92 provides clock signal.In optimum implementation, oscillator 412 produces the clock signal of 30MHz.Oscillator 412 links to each other with dormant circuit 430 by line 432.After dormant circuit 430 receives the INTb signal from line 434, dormant circuit 430 will be forbidden oscillator 412.The INTb signal is normally provided by the main frame (not shown).If do not produce the disk access request in the interval at the fixed time usually, main frame will provide sleep signal by the position, a position to a register in the register file 366.

Support hardware also comprises one by Vphase and

Vcomm line

336 and 328 rotation circuits 436 that link to each other with servo ic 96.Rotation circuit 436 links to each other with processor 360 with register file 366 with 440 by line 438.When rotation circuit 336 receives the Vphase signal, circuit 436 provides look-at-me by SPININT line 440 to processor 360.The Vphase signal also is provided with the inside Vcomm timer in the rotation circuit 436.In addition, rotation circuit 436 also reads a special register in the register file 366.Content in the register file 366 provides rotation circuit 436 to receive the Vphase signal and has been the time interval that the rotation control circuit 272 in the servo module 96 produces the Vcomm signals.

Processor 360 has a timer internal (not shown) of operation continuously.When processor receives the SPININT signal, after line 440 was rotated circuit 436 and activates, processor 360 read the numerical value of Vcomm timer in time of timer internal and the rotation circuit 436.The numerical value representative of Vcomm timer receives the Vphase signal and processor 360 receives the SPININT look-at-me time interval.Deduct the Vcomm time in the numerical value of timer internally, the time that obtains is compared with the theoretical time again, thereby whether the speed of judging electric rotating machine 20 exists deviation.Electric rotating machine 20 has 12 utmost points usually, and each swing circle can produce 36 Vphase signals.

Processor receives look-at-me H sector, SPININT, HOSTINT and DISKINT, press level, at first responding H sector and interrupt (voice coil loudspeaker voice coil subtask), secondly is SPININT look-at-me (electric rotating machine subtask), is HOSTINT or DISKINT look-at-me (data subtask) then.Correspondingly, when train of impulses demodulation 374 detects synchronization pulse, will send a pulse to processor 360 by H sector line 390.One receives H sector signal, servo programe of processor 360 initialization.Processor 360 begins to read the Gray code information in the register file 366.To determine the cylinder position of magnetic head 58, the data that will contain the voice coil loudspeaker voice coil control information are then write serial ports 362.Serial ports 362 sends data to servo ic 96.If Gray code conforms to required track location (for example, the data of disk being read or write), processor enables Z sector circuit 392 by enable line 396.

After Gray code ran through, processor 360 had A-B and C-D servo-information.By handling the servo pulse string signal, processor 360 is determined the position of magnetic head 58 with respect to track centreline.Processor 360 writes data to serial ports 362 then, sends servo ic 96 again to.If processor 360 is in servo period, reading of data from register file 366 no longer then.

After servo period finished, processor 360 received any SPININT look-at-me that comes from rotation circuit 436, calculates the error of motor actual speed and electric machine theory rotating speed.In optimum implementation, the difference of each sector of processor for recording is also calculated the average motor speed discrepancy of each disk swing circle.Usually in the index sector of each disk 18 swing circle, processor 360 passes through serial ports 362 with the rotating speed of control information writing servo chip 96 with control motor 20.

After swing circle finished, processor 360 received any HOSTINT or DISKINT look-at-me.If the HOSTINT end activates, processor 360 reads logical address from the buffer memory 232 of data management system 98.Processor 360 is converted to actual sector position on the disk with logical address.If magnetic head 58 not on required magnetic track, tracking cycle of processor 360 initialization.In case magnetic head has arrived required magnetic track, control chip 92 sends a Z sector signal to data management chip 98, then data management chip and R/W chip 94 transmission data.A DISKINT signal indicating DTD or show and in data transmission procedure, have mistake.When mistake existed, register file 366 was provided with an error bit.Processor 360 read error positions will be if wrongly will carry out an error-correcting routine.

Figure 13 has shown the synoptic diagram of R/W chip 94.R/W chip 94 comprises two-way 16 bit synchronization serial ports 450 that link to each other with serial ports 362 in the control chip 92.Serial ports 450 links to each other with control circuit 452 by line 454.Control circuit 452 links to each other with multiplexer 456 by line 458.Multiplexer 456 is by the instruction of serial ports 450 and control circuit 452 reception control chips 92, and multiplexer 456 switches different circuit on the magnetic head according to instruction.

R/W chip 94 comprises a FPDP 460 that links to each other with testing circuit 462 by bus 464.Testing circuit 462 links to each other with control circuit 452 with multiplexer 456 with 468 by line 466 respectively.The voltage jump that circuit 462 detecting sensors are provided also provides numeral output by line 370 to data port 246.R/W chip 94 has a demoder 472 that links to each other with the servo gating circuit 372 of controller chip 92.Demoder 472 links to each other with servo pulse serializer circuit 474 by line 476.The strobe pulse that demoder 472 responses receive enables servo pulse serializer circuit 474.Train of impulses circuit 474 provides servosignal A-B and C-D by

line

350 and 352 to servo ic 96.

In optimum implementation, R/W chip 94 is a slice similar integrated circuit of 32P4730 with Silicon Sys-tem Inc. (SSI).Preposition amplification chip is the TLV2234 of TI.

Figure 14 a-g is the process flow diagram of disc driver typical case running process.In process frame 500, main frame 212 sends a request that data is write logical address A0-A63 to disc driver.Magnetic head is positioned at the rear portion of a sector of disk.In frame 502, data management chip 98 will deposit buffer memory RAM232 in from the physical address and the data of main frame, and activate the HOSTINT look-at-me.When disk rotated, servo region was near magnetic head in the sector.In frame 404, the inquiry timer in the timing circuit 382 then and sends request signal and H sector signal to train of impulses demodulator circuit 374 and processor 360 respectively.Agc circuit also is enabled provides control signal to control with the automatic gain in the initialization block 506 to R/W chip 94.

By a parallel line, the electric rotating machine control circuit of servo ic 96 produces a Vphase signal that is received by the rotation circuit 436 of the control chip in the frame 508 92.Rotation circuit 436 provides a SPININT look-at-me to processor 360, and an internal clocking in the initialization block 510.Rotation circuit 436 also reads to determine the Vphase signal and the time interval that produces the Vcomm signal register file 366.In frame 512, rotation circuit 336 produces Vcomm in the back, interval at the fixed time.

Behind frame 506, train of impulses demodulator circuit 374 reads raw data from R/W chip 94, and enables Gray code circuit 370 immediately behind the synchronizing pulse in detecting frame 514.In frame 516, train of impulses demodulator circuit 374 is forbidden Gray's decoding circuit 370, and enables to provide to R/W chip 94 the servo gating circuit 372 of servo strobe pulse.The servo ic 96 of R/W chip 94 in frame 518 provides servosignal A-B and C-D.Servo ic 96 will be simulated gating signal and will be converted to the digital gating signal, and the digital gating signal is transmitted to controller chip 92, and be stored in the register file 366 of frame 518 and 520.In frame 522, the ID district of servo pulse then is stored in the register file 366.

In process frame 524, processor 360 receives H sector look-at-me.In decision block 526, processor 360 judges whether disc driver is in the tracking cycle.If driver is in the tracking cycle, in process frame 528, processor is reading of data from the register file 366 that has Gray code information.In frame 530-531, processor 360 compares Gray code and required track location, calculates the tracking electric current, produces a write order, sends write order to servo ic 96 by serial ports 274 and 362.If disk is in servo period, in frame 534, processor 360 is reading of data from the register file 366 that has servo bursts information.In frame 537-538, servo bursts information is used for judging whether magnetic head 58 is positioned at the center line of magnetic track, and obtains the corrective command of voice coil loudspeaker voice coil.In frame 532, processor 360 produces a write order that comprises the voice coil loudspeaker voice coil control data, gives servo ic 96 by serial ports.Numeral voice coil loudspeaker voice coil control data is converted to simulation voice coil loudspeaker voice coil control data by the DAC of servo ic, makes the actuating arm and the magnetic head of voice coil loudspeaker voice coil moving assembly.

In frame 538, processor 260 receives the SPININT look-at-me, if its existence.In process frame 540, the Vcomm timer of processor 360 read processor timer internals and rotation circuit 436, the time interval of calculating the Vphase signal, and with in its adding accumulated time.According to decision block 542, if the number of times that interrupts equals one-period, will calculate a rotation correction order, in frame 544 and 546, processor 360 provides a write order by serial ports to servo ic 96.The rotation correction order is tried to achieve by the difference of reference time and accumulated time.Accumulated time is put 0 in frame 547.Be the later use of rotation circuit 436, a new time interval leaves in the register file 366.Write order is transmitted to servo ic, and servo ic is converted into simulating signal, and simulating signal is offered the electric rotating machine control circuit.If the number of times that interrupts is not equal to one-period, in frame 548, accumulated time is deposited by processor 360.

In process frame 550, processor 360 receives the HOSTINT look-at-me from data management system 98.In process frame 552, processor 360 reads physical address from the buffer memory 332 of data management system 98 then, reads ID district data from register file 366.In frame 554, processor 360 is the actual sector position with physical address translations.According to decision block 556, if magnetic head 58 not on actual sector, in process frame 558, tracking cycle of processor 360 initialization, and write order that produce to give servo ic 96 is with mobile voice coil loudspeaker voice coil.Actuating arm will be moved, and be in correct magnetic track up to magnetic head.Processor 360 will constantly read Gray code, and will be adjacent up to the position and the magnetic head of actual sector.In frame 560, processor 360 enables Z sector circuit 392, and circuit 392 can activate Z sector end after the servo region of sector finishes.The activation initialization of Z sector end writes from the data of data management system 98 to R/W chips, and in process frame 562, the R/W chip writes the sectors of data district with data.

Though this paper has gone explanation to above-mentioned exemplary embodiment in conjunction with injecting meaning, but be appreciated that this embodiment only is exemplifying, be not subjected to restriction of the present invention, and the embodiment of this invention shown in not being subjected to and the restriction of structure, therefore can make amendment to the part of some technical maturations.

Claims

1. hard disk drive comprises:

Housing with first end and second end;

Be arranged in first disk of above-mentioned housing;

Be arranged in the second disk of above-mentioned housing;

Be arranged in the 3rd disk of above-mentioned housing;

An electric rotating machine that is used to rotate above-mentioned disk groups;

An actuating arm assembly that is connected on the above-mentioned disk groups;

Printed circuit board (PCB) between above-mentioned first end of above-mentioned disk groups and above-mentioned housing;

A controller chip that is installed on the above-mentioned printed circuit board (PCB);

A data management chip that is installed on the above-mentioned printed circuit board (PCB);

One be installed on the above-mentioned printed circuit board (PCB) the read/write chip and

A servo module chip that is installed on the above-mentioned printed circuit board (PCB).

2. the hard disk drive described in the claim 1 also comprises a preposition amplification chip that is installed on the above-mentioned printed circuit board (PCB).

3. the hard disk drive described in the claim 1, wherein above-mentioned electric rotating machine comprises a main shaft, a wheel hub and a conical bearing that is installed on above-mentioned main shaft and the above-mentioned wheel hub.

4. the hard disk drive described in the claim 1, wherein above-mentioned housing comprises a cover plate, a base plate, above-mentioned cover plate links to each other with the securing member of above-mentioned base plate with the C tee section.

5. the hard disk drive described in the claim 1, wherein above-mentioned actuating arm assembly comprises an actuating arm, above-mentioned actuating arm has a ball bearing that stretches into a bearing seat vee-cut, and above-mentioned ball bearing links to each other with above-mentioned bearing seat with Bearing Installation parts.

6. the hard disk drive described in the claim 1, wherein the thickness of above-mentioned housing is approximately 10mm.

7. the hard disk drive described in the claim 6, wherein the width of above-mentioned housing is approximately 54mm, and length is approximately 85mm.

8. portable hard disk driver card comprises:

Housing with first end and second end;

A connector that is positioned at above-mentioned first end of above-mentioned housing;

Be arranged in first disk of above-mentioned housing;

Be arranged in the second disk of above-mentioned housing;

Be arranged in the 3rd disk of above-mentioned housing;

An actuating arm assembly that is connected on the above-mentioned disk groups;

A control chip that is installed on the above-mentioned printed circuit board (PCB);

9. the hard drive card described in the claim 8 also comprises a preposition amplification chip that is contained in above-mentioned printed circuit board (PCB).

10. the hard drive card described in the claim 8, wherein above-mentioned electric rotating machine comprises a main shaft, a wheel hub and a conical bearing that is installed on above-mentioned main shaft and the above-mentioned wheel hub.

11. the hard drive card described in the claim 8, wherein above-mentioned housing comprises a cover plate, a base plate, and above-mentioned cover plate links to each other with the securing member of above-mentioned base plate with the C tee section.

12. the hard drive card described in the claim 8, wherein above-mentioned actuating arm assembly comprises an actuating arm, above-mentioned actuating arm has a ball bearing that stretches into a bearing seat vee-cut, and above-mentioned ball bearing links to each other with above-mentioned bearing seat with Bearing Installation parts.

13. the hard drive card described in the claim 8, wherein the thickness of above-mentioned housing is approximately 10mm.

14. the hard drive card described in the claim 13, wherein the width of above-mentioned housing is approximately 54mm, and length is approximately 85mm.

15. the hard disk drive that can be installed on the external unit comprises:

Casing device with first end and second end;

Be used to store first disk set of data;

Be used to store the second disk device of data;

Be used to store the 3rd disk set of data;

Be used to rotate the electric rotating machinery apparatus of above-mentioned disk groups;

Be used for above-mentioned disk transmission information the actuating arm assembly apparatus;

Be used for data administrator with said external device transmission information;

The read/write device that is used for transmission information between above-mentioned actuating arm assembly apparatus and above-mentioned data administrator;

Be used to control the servo module device of above-mentioned actuating arm assembly apparatus and above-mentioned electric rotating machinery apparatus;

Be used to control above-mentioned data administrator, the control device of above-mentioned read/write device and above-mentioned servo module device;

Be used to support above-mentioned control device, above-mentioned data administrator, the PBA printed board arrangement of above-mentioned read/write device and above-mentioned servo module device, above-mentioned printed circuit board (PCB) is between above-mentioned first end of above-mentioned disk set and above-mentioned housing.

16. the hard disk drive described in the claim 15 also comprises an adapting amplifier device, is used to amplify the signal from the actuating arm assembly apparatus, above-mentioned adapting amplifier device is installed on the above-mentioned printed circuit board (PCB).

17. the hard disk drive described in the claim 15, wherein above-mentioned electric rotating machinery apparatus comprises a main shaft, a wheel hub and a conical bearing that is installed on above-mentioned main shaft and the above-mentioned wheel hub.

18. the hard disk drive described in the claim 15, wherein above-mentioned casing device comprises a cover plate, a base plate, and above-mentioned cover plate links to each other with the securing member of above-mentioned base plate with the C tee section.

19. the hard disk drive described in the claim 15, wherein above-mentioned actuating arm assembly apparatus comprises an actuating arm, above-mentioned actuating arm has a ball bearing that stretches into a bearing seat vee-cut, and above-mentioned ball bearing links to each other with above-mentioned bearing seat with Bearing Installation parts.

20. the hard disk drive described in the claim 15, wherein the thickness of above-mentioned casing device is approximately 10mm.

21. the hard disk drive described in the claim 20, wherein the width of above-mentioned casing device is approximately 54mm, and length is approximately 85mm.

22. the portable hard disk driver card that can be installed on the external unit comprises:

Casing device with first end and second end;

Be positioned at the coupling arrangement of above-mentioned first end of above-mentioned housing;

Be used to store first disk set of data;

Be used to store the second disk device of data;

Be used to store the 3rd disk set of data;

23. the hard disk drive described in the claim 22 also comprises an adapting amplifier device, is used to amplify the signal from the actuating arm assembly apparatus, above-mentioned adapting amplifier device is installed on the above-mentioned printed circuit board (PCB).

24. the hard disk drive described in the claim 22, wherein above-mentioned electric rotating machinery apparatus comprises a main shaft, a wheel hub and a conical bearing that is installed on above-mentioned main shaft and the above-mentioned wheel hub.

25. the hard disk drive described in the claim 22, wherein above-mentioned casing device comprises a cover plate, a base plate, and above-mentioned cover plate links to each other with the securing member of above-mentioned base plate with the C tee section.

26. the hard disk drive described in the claim 22, wherein above-mentioned actuating arm assembly apparatus comprises an actuating arm, above-mentioned actuating arm has a ball bearing that stretches into a bearing seat vee-cut, and above-mentioned ball bearing links to each other with above-mentioned bearing seat with Bearing Installation parts.

27. the hard disk drive described in the claim 22, wherein the thickness of above-mentioned casing device is approximately 10mm.

28. the hard disk drive described in the claim 27, wherein the width of above-mentioned casing device is approximately 54mm, and length is approximately 85mm.

29. the hard disk drive that can be installed on the external unit comprises:

A thickness is approximately the housing of 10mm;

Be arranged in first disk of above-mentioned housing;

Be arranged in the second disk of above-mentioned housing;

Be arranged in the 3rd disk of above-mentioned housing;

An actuating arm assembly that is connected on the above-mentioned disk groups;

Electronic installation is used for transmission information between above-mentioned disk and external unit, and is used to control above-mentioned actuating arm assembly apparatus and above-mentioned electric rotating machinery apparatus, and above-mentioned electronic installation is arranged in above-mentioned housing.

30. the hard disk drive described in the claim 29, wherein the width of above-mentioned housing is approximately 54mm, and length is approximately 85mm.

31. the hard disk drive described in the claim 29, wherein electronic installation comprises, be used for data administrator with external unit transmission information, the read/write device that is used for transmission information between above-mentioned actuating arm assembly apparatus and above-mentioned data administrator, be used to control the servo module device of above-mentioned actuating arm assembly apparatus and above-mentioned electric rotating machinery apparatus, be used to control above-mentioned data administrator, the control device of above-mentioned read/write device and above-mentioned servo module device.

32. the hard disk drive described in the claim 29, wherein above-mentioned electric rotating machinery apparatus comprises a main shaft, a wheel hub and a conical bearing that is installed on above-mentioned main shaft and the above-mentioned wheel hub.

33. the hard disk drive described in the claim 29, wherein above-mentioned casing device comprises a cover plate, a base plate, and above-mentioned cover plate links to each other with the securing member of above-mentioned base plate with the C tee section.

34. the hard disk drive described in the claim 29, wherein above-mentioned actuating arm assembly apparatus comprises an actuating arm, above-mentioned actuating arm has a ball bearing that stretches into a bearing seat vee-cut, and above-mentioned ball bearing links to each other with above-mentioned bearing seat with Bearing Installation parts.

35. the hard disk drive described in the claim 30, wherein electronic installation comprises, be used for data administrator with external unit transmission information, the read/write device that is used for transmission information between above-mentioned actuating arm assembly apparatus and above-mentioned data administrator, be used to control the servo module device of above-mentioned actuating arm assembly apparatus and above-mentioned electric rotating machinery apparatus, be used to control above-mentioned data administrator, the control device of above-mentioned read/write device and above-mentioned servo module device.

36. the hard disk drive described in the claim 35, wherein above-mentioned electric rotating machinery apparatus comprises a main shaft, a wheel hub and a conical bearing that is installed on above-mentioned main shaft and the above-mentioned wheel hub.

37. the hard disk drive described in the claim 36, wherein above-mentioned casing device comprises a cover plate, a base plate, and above-mentioned cover plate links to each other with the securing member of above-mentioned base plate with the C tee section.

38. the hard disk drive described in the claim 37, wherein above-mentioned actuating arm assembly apparatus comprises an actuating arm, above-mentioned actuating arm has a ball bearing that stretches into a bearing seat vee-cut, and above-mentioned ball bearing links to each other with above-mentioned bearing seat with Bearing Installation parts.

39. the hard disk drive described in the claim 29 is comprising a connector that is positioned at an end of above-mentioned housing.