JP2872276B2 - Data recording device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a data recording apparatus suitable for a disk-shaped recording medium which performs recording and reproduction by a zone bit recording method.

[Conventional technology]

There is a hard disk drive (hereinafter, simply referred to as a disk) as a disk-shaped recording medium for recording data of a computer or the like. As a method of recording information on a disc, CA
There are a V (constant angular velocity) system and a CLV (constant linear speed) system.

In a disk recorded by the CAV method, a seek (a head positioning process) is a sum of a moving time of the head and a rotation waiting time until a desired data bit arrives, and a high-speed seek is possible. On the other hand, since the linear velocity of the outer track is higher than that of the inner track, when the recording length per bit in the inner track is appropriately set, the recording length per bit in the outer track is larger than necessary. turn into. As a result, the recording density cannot be made very high, which is inconvenient for long-term information recording.

In a disk recorded by the CLV method, the recording length per bit is the same over all tracks. Therefore, the recording density is increased, which is suitable for long-time information recording. On the other hand, at the time of seeking, it is necessary to adjust the rotation speed of the disk according to the track in which the desired bit exists. Since the moment of the rotating part of the disk is increased to obtain stable rotation, it takes a lot of time to reach the target speed, and the seek becomes slow, which is inconvenient for high-speed information recording. is there.

As a data recording method that solves the problems of the CAV method and the CLV method described above, there is a data recording method (hereinafter, referred to as a zone bit recording method) described in JP-A-63-200306. This method will be described with reference to FIG.

FIG. 2 is an explanatory diagram of a disk formatted by a zone bit recording method. As shown in this figure, the disc has zones Z1, Z2, Z3, ...
Is divided by The number of sectors in each track in one zone is fixed. The write / read frequency of each zone is given an optimal value for the data density of the innermost track of the zone. By doing so, the data density can be made relatively uniform over the entire area of the disk, so that a larger amount of information can be recorded than in the CAV system, although there is a slight loss in the CLV system. Since the angular velocity is constant, seeking can be performed at the same speed as that of the CAV method. In addition, since a faster write / read frequency is used for the outer track than for the inner track, high-speed data transfer is possible for the outer track compared to the inner track. FIG. 3 shows an example of the number of sectors and the transfer rate ratio for each zone. As shown here, the speed of the outer peripheral zone is higher than that of the inner peripheral zone.

[Problems to be solved by the invention]

In the above-mentioned conventional disk, no consideration is given to the fact that the speed of the outer peripheral zone is higher than that of the inner peripheral zone, and there is a problem that the high-speed performance of the disk cannot be sufficiently utilized. For example, it is always read when the system starts up
When the OS and the like are arranged on the inner circumference, the rise time becomes long.

An object of the present invention is to provide a data recording device that makes use of the high speed of the zone bit recording method.

Another object of the present invention is to provide a compound file device comprising a plurality of data recording devices, which makes use of high speed.

[Means for solving the problem]

In order to achieve the above object, according to the attribute data, a data block can be recorded in an optimum zone or its vicinity.

Furthermore, as attribute data, data priority, user
ID and zone NO are used.

Further, an operating system or character font data is recorded in the outer peripheral zone.

Further, there are provided means for storing the number of accesses to the data block and the registration time, and means for moving the data block from one zone to another zone.

In order to achieve another object, a data block can be recorded on an optimal data recording device according to attribute data.

Further, there are provided means for storing the number of accesses to the data block, means for storing the registration time of the data block, and means for moving the data block from one data recording device to another data recording device.

[Action]

Since the data is written to the optimum zone in accordance with the attribute data, the optimum arrangement in the high-speed outer zone and the constant-speed inner zone can be easily performed according to the data, and the reading and writing can be performed at a high speed.

By assigning the data priority as attribute data, data can be arranged from the outer periphery in the order of higher priority. By assigning a user ID as attribute data, data can be arranged in a recording zone according to the user. Can be placed in the designated zone.

By arranging the operation system in the outer peripheral zone, the start-up time of the information processing apparatus can be reduced, and by arranging the character font data in the outer peripheral zone, the display or print processing of the information processing apparatus can be accelerated.

By starting data recording from the outer periphery, data is arranged in the outer peripheral zone as long as the used data area in the data recording device is small, so that high-speed reading and writing can be performed.

By moving the data block from the current zone to another zone according to the elapsed time after registering the data block and the number of access circuits, frequently used data blocks can be arranged in a high-speed outer zone, so that high-speed reading and writing can be performed. .

Since the data can be recorded in the most suitable data recording device according to the attribute data, the optimum arrangement in the high-speed data recording device and the low-speed data recording device can be easily performed according to the data, and the reading and writing can be performed at a high speed.

By moving a data block from a currently recorded data recording device to another data recording device in accordance with the elapsed time after data block registration and the number of accesses, a frequently used data block can be read and written at high speed.

〔Example〕

 Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a block diagram of the hard disk drive of the first embodiment. Reference numeral 12 denotes an input / output channel connected to an information processing device (not shown). Reference numeral 1 denotes an R / W signal 5, a logical address 6, and attribute data 7 output from the input / output channel 12, which are stored in a scale 2. Disk usage list
An address conversion unit that converts the logical address 6 into a physical address 10 using the logical address / physical address conversion table 13 and the logical address / physical address conversion table 14 and gives the physical address 10 to the zone bit recording type hard disk 3 (hereinafter, referred to as a unit disk). Further, the address conversion unit 1 includes a microprocessor 112 (MPU 112), an MPU 112
And a I / O controller 111 for performing input / output control with the outside.

Here, the logical address 6 indicates one logical sector,
The physical address 10 indicates a physical position of one sector on the disk 3.

4 converts the parallel data 8 output from the input / output channel 12 into serial data 11 at the time of data writing and supplies the serial data 11 to the disk 3, and converts the serial data 11 output from the disk 3 into parallel data 8 at the time of data reading. P / S, S / P conversion section having a function of providing the input / output channel 12 to the input / output channel 12.

FIG. 4 is a diagram showing an example of the disk usage status list 13. In this figure, it is assumed that the number of sectors of the disk is 2, the number of tracks is 4, the number of disks is 1, or the tracks 1 and 2 constitute the zone 1, and the tracks 3 and 4 constitute the zone 2. The use flag indicates whether the sector is used.

FIG. 5 is a diagram showing an example of the logical address / physical address conversion table 14. As in Fig. 4, the number of sectors is 2, and the number of tracks is
4. It is assumed that the number of disks is 1.

FIG. 6 is a flowchart showing an operation in the MPU 112 of the address conversion unit 1 at the time of writing to the disk. This flowchart is stored in the ROM 113 of FIG.

FIG. 7 is a flowchart showing the operation of the address conversion unit when reading from the disk.

Hereinafter, the address output operation during writing to the disk will be described with reference to FIG. First, in S1 and S2,
A logical address 6 and attribute data 7 are input.

Here, the attribute data 7 is, for example, data priority, user ID, zone NO, and the like. Based on this data, the zone NO is determined in S3. When determining the zone number from the attribute data 7, for example, the following criteria are used.

(1) Higher-speed outer peripheral zones in order of priority
Give NO.

(2) The zone numbers of the high-speed outer peripheral zones are given in descending order of the user ID level.

(3) When zone NO is given, conversion is unnecessary.

The free area of the zone determined in S4 is checked using the disk usage status list 13, and if there is a free area, the physical address of the free area is generated, and the physical address is written to the logical address / physical address conversion table 14 in S6. At the same time, the use flag of the sector is set in the sector use status table 13. Further, in S7, the physical address 11 is output and given to the disk 3. If there is no free space, check whether the zone NO has reached the maximum value in S5, and if it is the maximum value, perform a process of notifying an information processing device (not shown) that the disk is full in S7, In S6, the zone number is incremented, and the next zone is checked for availability.

Next, an address output operation at the time of reading from a disk will be described with reference to FIG. The control program of this flowchart is also stored in the ROM 113 of FIG. First, when a logical address is input at T1, a physical address is generated using the logical address / physical address conversion table 14 at T2, and the physical address is output to the disk 3 at T3.

As described above, according to the present embodiment, writing to the optimum zone or a zone adjacent thereto can be realized according to the attribute data. Therefore, data can be written to the high-speed outer zone and the low-speed inner zone according to the nature of the data. This makes it possible to easily perform the optimal arrangement of the hard disk drives and to provide a high-speed hard disk drive.

Next, a second embodiment will be described. FIG. 8 is a diagram showing the data arrangement on the disk of the zone bit recording type hard disk device of the second embodiment. 50 indicates a disk. Reference numeral 15 denotes a high-speed read / write zone on the outer periphery, in which an operation system, character font data, and image data used in an information processing device (not shown) are arranged. Here, the operation system, character font data, and image data are regarded as attribute data. Reference numeral 16 denotes a zone where the speed is slightly lower than that of the outer periphery, where a user application program is arranged.

The OS is generally loaded into the main memory of the information processing device (not shown) when the system starts up.
By arranging on the outer periphery, the start-up time of the information processing device (not shown) can be shortened.

By arranging the character fonts on the outer periphery, the display or printing of the information processing device (not shown) can be speeded up.

 Next, a third embodiment will be described.

FIG. 9 is an overall block diagram of the hard disk drive of the third embodiment. 23 is a zone bit recording type hard disk having four zones (hereinafter referred to as disk 23), 18 is a disk usage status table 13 and a logical address / physical address conversion table
14 is a memory for storing a history table 51 of the number of accesses to a certain data block and the registration time, 19 is a buffer for at least one sector, 24 is a clock, and 12 is an input / output channel. Reference numeral 17 denotes a transfer control unit having a function of rearranging data blocks on the disk 23 in an optimal arrangement using the history table stored in the memory 18, the buffer 19, and the clock 24. And data transfer.

FIG. 10 is a diagram showing an example of the history table stored in the memory 18.

In the present apparatus, the number of accesses to a data block and the registration time are used as attribute data. In this way, the attribute data is not only provided first, but also added later.

When newly writing data in the disk device, the data is written in the outermost peripheral zone or its vicinity.
Data block rearrangement is performed on input / output channel 12
Is automatically started when a rearrangement command is given or a predetermined time has elapsed after the previous rearrangement was executed.

FIG. 11 is a flowchart showing a procedure of a data block rearranging method. Hereinafter, the procedure for rearranging the data blocks will be described with reference to FIG.

First, 0 is entered in the address at U1. The history table 51 of the data block addressed by U2 is read. If the data block is less than one month after registration, the process proceeds to U8. When one month or more has elapsed, the registration time in the history table 51 is rewritten to the current time. Next, the transfer destination zone NO is determined based on the access frequency and the zone NO determination reference table shown in FIG. At U6, it is checked whether or not the transfer destination zone NO is equal to the current zone NO. If not equal, the data block of the current zone is transferred to the buffer 19 in U7, and then transferred to the free area of the transfer destination zone NO or a neighboring zone. Thereafter, the address is incremented in U8, and if the address is not the final address in U9, the process proceeds to the next data block.

As described above, the newly written data is arranged in the outer peripheral zone, and the data arrangement on the disk is changed in accordance with the number of data accesses after a certain period of time, so that the frequently used data blocks can be stored in the outer peripheral zone at high speed. Since the zones are arranged, a high-speed hard disk device can be provided.

In the first, second, and third embodiments, the application example of the present invention to a hard disk device having information recording tracks on a concentric circle has been described. However, the present invention can be applied to a spiral optical disk device. Needless to say.

 Next, the embodiment of FIG. 4 will be described.

FIG. 13 is a block diagram of a composite file device comprising a plurality of data recording devices of the fourth embodiment. Functional blocks equivalent to those in FIG. 1 are given the same numbers. In FIG. 14, reference numeral 40 denotes a semiconductor memory device whose storage contents are held by a backup power supply 41, which has a high speed but a large bit unit and a small storage capacity. Reference numeral 38 denotes a hard disk device, which is slightly inferior in speed to a semiconductor memory device, but has a relatively low unit cost per bit and a medium storage capacity. Numeral 39 denotes an optical disk device for writing and reading data by optical means. Although the speed is inferior, the unit price per bit is the lowest and the storage capacity is large. The memory 2 stores a use status list 44, a logical address / physical address conversion table 45, and a data block use history table 46 of each data recording device. 43,34,
Reference numeral 35 denotes a P / S and S / P converter for performing parallel-to-serial conversion at the time of writing and serial-to-parallel conversion at the time of reading. Reference numeral 25 denotes a file controller for sending data sent from the input / output channel to each data recording device.

An address output operation at the time of writing and reading of the file controller will be described.

At the time of writing, a data recording device for recording data is selected based on the attribute data 7, and one of the semiconductor memory device enable signal, the hard disk device enable signal, and the optical disk device enable signal is activated.
Further, the use status list 44 is read from the memory 2 and an empty area is found. After setting the use flag in the found empty area, the found physical address and device code corresponding to the requested logical address are written in the logical address / physical address list 45. Thereafter, the physical address 26 is given to each data recording device.

At the time of reading, the logical address / physical address list 45 is read, and from this, the physical address corresponding to the logical address and the data recording device are obtained, and the physical address is output.

Also, based on the data block usage history table 46, it has a function to move data blocks with a large number of accesses after a certain period of time to a high-speed data recording device and to move data blocks with a small number of accesses to a low-speed data recording device. ing.

As described above, according to this embodiment, an appropriate data recording device can be automatically selected based on the attribute data 17,
An efficient and high-speed composite file device can be provided.

Also, by performing data movement between the data recording devices according to the number of accesses after a certain period of time of the data blocks, frequently used data blocks or newly registered data blocks are arranged in a high-speed data storage device.
A high-speed composite file device can be provided.

〔The invention's effect〕

According to the present invention, since data is written to a suitable zone in accordance with the attribute data, optimal arrangement in the high-speed outer zone and the low-speed inner zone can be easily performed according to the data, and a high-speed data recording device can be provided. effective.

Also, by giving the priority of data as attribute data, data can be arranged from the outer periphery in order of higher priority,
By assigning a user ID as attribute data, it can be placed in the recording zone according to the user,
By assigning NO, it can be located in the designated zone, so that optimal placement according to the nature of the data can be easily performed,
A high-speed data recording device can be provided.

Further, by arranging the operation system in the outer peripheral zone, the start-up time of the information processing apparatus can be reduced, and by arranging the character font data in the outer peripheral zone, display or printing of the information processing apparatus can be performed at high speed.

Further, since data recording is started from the outer periphery, data is arranged in the outer peripheral zone as long as the used data area in the data recording device is small, so that a high-speed data recording device can be provided.

Further, by moving the data block from the current zone to another zone according to the elapsed time after the data block registration and the number of accesses, a frequently used data block can be arranged in a high-speed outer zone, so that a high-speed data recording device is provided. There is an effect that can be provided.

Further, since the data can be recorded in the most suitable data recording device in accordance with the attribute data, the optimum arrangement in the high-speed data recording device and the low-speed data recording device can be easily performed according to the data, and a high-speed composite file device can be provided. effective.

Furthermore, by moving the data block from the currently recorded data recording device to another data recording device according to the elapsed time after the data block registration and the number of accesses, the frequently used data block can be read and written at high speed, A high-speed composite file device can be provided.

[Brief description of the drawings]

FIG. 1 is a block diagram of a hard disk drive according to a first embodiment, FIG. 2 is an explanatory diagram of a disk formatted by a zone bit recording method, and FIG. 3 is an example of the relationship between the number of sectors and the transfer speed ratio for each zone. FIG. 4, FIG. 4 is a diagram showing an example of a disk usage status list, FIG. 5 is a diagram showing an example of a logical address / physical address conversion table, and FIG. FIG. 7 is a flowchart showing the operation, FIG. 7 is a flowchart showing the operation of the address conversion unit when reading from the disk, and FIG. 8 shows the data arrangement on the disk of the zone bit recording type hard disk device of the second embodiment. Figure, ninth
FIG. 10 is an overall block diagram of a hard disk device according to a third embodiment, FIG. 10 is a diagram showing an example of a history table stored in a memory, FIG. 11 is a flowchart showing a procedure of a data block rearranging method, and FIG. The figure shows access times and zone numbers
FIG. 13 is a block diagram of a composite file device comprising a plurality of data recording devices according to the fourth embodiment. 1 ... Address conversion unit, 2 ... Memory, 13 ... Disk usage status list, 14 ... Logical address / physical address conversion table, 3 ... Zone bit recording hard disk, 5
... R / W signal, 6 ... logical address, 7 ... data attribute.

Continued on the front page (72) Inventor Shunji Nagata 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Prefecture Within Hitachi Video Engineering Co., Ltd. (72) Inventor Yukito Takada 292 Yoshida-cho, Totsuka-ku, Yokohama-shi, Kanagawa Hitachi Video Engineering, Ltd. (56) References JP-A-1-317275 (JP, A) (58) Fields investigated (Int. Cl. ⁶ , DB name) G11B 20/10, 20/12

Claims (5)

(57) [Claims] A disk recording medium for recording information on an information recording track at a constant angular velocity is divided into zones consisting of a plurality of information recording tracks, and zone bit recording for reading and writing at an optimum recording frequency according to each zone. A zone data recording apparatus according to claim 1, wherein a zone for data recording is determined according to a data attribute, and a data priority, a user ID, and a zone number are used as said data attribute. 2. A zone bit recording type data recording apparatus, wherein an operating system or character font data is recorded in an outer peripheral zone. 3. A zone bit recording type data recording apparatus comprising: means for storing the number of accesses to a data block; means for storing a registration time of a data block; and means for moving a data block from one zone to another zone. A zone bit recording type data recording device, wherein a data block is moved from a current zone to another zone according to an elapsed time after registration and the number of accesses. 4. A compound file device comprising a plurality of data recording devices, wherein a data recording device for recording data is determined according to a data attribute. 5. A composite file device comprising a plurality of data recording devices, means for storing the number of times of accessing a data block, means for storing the registration time of a data block, and recording data blocks from one data recording device to another data recording device. A compound file device comprising means for moving to a device, wherein a data block is moved from a current data recording device to another data recording device according to an elapsed time after registration and the number of accesses.