US20150103433A1 - Hard disk drive having multiple disk stacks on a rotatable platform - Google Patents
Hard disk drive having multiple disk stacks on a rotatable platform Download PDFInfo
- Publication number
- US20150103433A1 US20150103433A1 US14/051,281 US201314051281A US2015103433A1 US 20150103433 A1 US20150103433 A1 US 20150103433A1 US 201314051281 A US201314051281 A US 201314051281A US 2015103433 A1 US2015103433 A1 US 2015103433A1
- Authority
- US
- United States
- Prior art keywords
- disk
- head
- stacks
- magnetic
- hard disk
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000000712 assembly Effects 0.000 claims description 9
- 238000000429 assembly Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 description 6
- 238000013459 approach Methods 0.000 description 3
- 238000012937 correction Methods 0.000 description 2
- 238000013500 data storage Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 239000000725 suspension Substances 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000002372 labelling Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/4806—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives
- G11B5/4873—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed specially adapted for disk drive assemblies, e.g. assembly prior to operation, hard or flexible disk drives the arm comprising piezoelectric or other actuators for adjustment of the arm
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/54—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head into or out of its operative position or across tracks
- G11B5/55—Track change, selection or acquisition by displacement of the head
- G11B5/5521—Track change, selection or acquisition by displacement of the head across disk tracks
- G11B5/5569—Track change, selection or acquisition by displacement of the head across disk tracks details of specially adapted mobile parts, e.g. electromechanical control devices
Definitions
- Embodiments of the invention relate generally to hard disk drive (HDD) storage devices and more particularly to lowering the cost per unit of storage capacity.
- HDD hard disk drive
- a hard-disk drive is a non-volatile storage device that is housed in a protective enclosure and stores digitally encoded data on one or more circular disks having magnetic surfaces.
- each magnetic-recording disk is rapidly rotated by a spindle system.
- Data is read from and written to a magnetic-recording disk using a read/write head that is positioned over a specific location of a disk by an actuator.
- a read/write head uses a magnetic field to read data from and write data to the surface of a magnetic-recording disk.
- Write heads make use of the electricity flowing through a coil, which produces a magnetic field. Electrical pulses are sent to the write head, with different patterns of positive and negative currents. The current in the coil of the write head induces a magnetic field across the gap between the head and the magnetic disk, which in turn magnetizes a small area on the recording medium.
- Embodiments are directed to a hard disk drive (HDD) having multiple disk stacks fixed to a carousel and one or more head stack assembly (HSA) for accessing portions of one or more magnetic-recording disk of each of the multiple disk stacks.
- HDD hard disk drive
- HSA head stack assembly
- a multiple-disk-stack HDD may be configured with ten disk stacks circularly mounted on the carousel, thereby configured for installation in a standard 19-inch equipment rack.
- a lower cost HDD design is described which can be manufactured to have a lower cost per unit of storage.
- Embodiments include an HSA having a single actuator configured to access each disk stack asynchronously, after the carousel rotates to move a disk stack in a fixed position relative to the HSA.
- Embodiments also include multiple head stack assemblies configured to access multiple disk stacks simultaneously.
- Embodiments discussed in the Summary of Embodiments of the Invention section are not meant to suggest, describe, or teach all the embodiments discussed herein.
- embodiments of the invention may contain additional or different features than those discussed in this section.
- FIG. 1 is a plan view of a conventional hard disk drive (HDD).
- FIG. 2 is a plan view of a multiple disk stack HDD, according to an embodiment of the invention.
- HDD hard disk drive
- HSA head stack assembly
- Embodiments of the invention relate to a hard-disk drive (HDD).
- a plan view illustrating a conventional HDD 100 is shown in FIG. 1 .
- FIG. 1 illustrates the functional arrangement of components of the HDD including a slider 110 b that includes a magnetic-reading/recording head 110 a.
- slider 110 b and head 110 a may be referred to as a head slider.
- the HDD 100 includes at least one head gimbal assembly (HGA) 110 including the head slider, a lead suspension 110 c attached to the head slider, and a load beam 110 d attached to the lead suspension 110 c.
- HGA head gimbal assembly
- the HDD 100 also includes at least one magnetic-recording media 120 rotatably mounted on a spindle 124 and a drive motor (not shown) attached to the spindle 124 for rotating the media 120 .
- the head 110 a includes a write element and a read element for respectively writing and reading information stored on the media 120 of the HDD 100 .
- the media 120 or a plurality of disks may be affixed to the spindle 124 with a disk clamp 128 .
- the HDD 100 further includes an arm 132 attached to the HGA 110 , a carriage 134 , a voice-coil motor (VCM) that includes an armature 136 including a voice coil 140 attached to the carriage 134 ; and a stator 144 including a voice-coil magnet (not visible).
- VCM voice-coil motor
- the armature 136 of the VCM is attached to the carriage 134 and is configured to move the arm 132 and the HGA 110 to access portions of the media 120 being mounted on a pivot-shaft 148 with an interposed pivot-bearing assembly 152 .
- the carriage 134 is called an “E-block,” or comb, because the carriage is arranged to carry a ganged array of arms that gives it the appearance of a comb.
- An assembly comprising a head gimbal assembly (e.g., HGA 110 ) including a flexure to which the head slider is coupled, an actuator arm (e.g., arm 132 ) to which the flexure is coupled, and an actuator (e.g., the VCM) to which the actuator arm is coupled, may be collectively referred to as a head stack assembly (HSA).
- HSA head stack assembly
- An HSA may, however, include more or fewer components than those described.
- an HSA may refer to an assembly that further includes electrical interconnection components.
- an HSA is the assembly configured to move the head slider to access portions of the media 120 (e.g., magnetic-recording disks) for read and write operations.
- electrical signals for example, current to the voice coil 140 of the VCM, write signal to and read signal from the head 110 a
- a flexible interconnect cable 156 (“flex cable”).
- Interconnection between the flex cable 156 and the head 110 a may be provided by an arm-electronics (AE) module 160 , which may have an on-board pre-amplifier for the read signal, as well as other read-channel and write-channel electronic components.
- the AE 160 may be attached to the carriage 134 as shown.
- the flex cable 156 is coupled to an electrical-connector block 164 , which provides electrical communication through electrical feedthroughs provided by an HDD housing 168 .
- the HDD housing 168 also referred to as a casting, depending upon whether the HDD housing is cast, in conjunction with an HDD cover provides a sealed, protective enclosure for the information storage components of the HDD 100 .
- other electronic components including a disk controller and servo electronics including a digital-signal processor (DSP), provide electrical signals to the drive motor, the voice coil 140 of the VCM and the head 110 a of the HGA 110 .
- the electrical signal provided to the drive motor enables the drive motor to spin providing a torque to the spindle 124 which is in turn transmitted to the media 120 that is affixed to the spindle 124 by the disk clamp 128 ; as a result, the media 120 spins in a direction 172 .
- the spinning media 120 creates a cushion of air that acts as an air-bearing on which the air-bearing surface (ABS) of the slider 110 b rides so that the slider 110 b flies above the surface of the media 120 without making contact with a thin magnetic-recording medium in which information is recorded.
- ABS air-bearing surface
- the electrical signal provided to the voice coil 140 of the VCM enables the head 110 a of the HGA 110 to access a track 176 on which information is recorded.
- the armature 136 of the VCM swings through an arc 180 which enables the HGA 110 attached to the armature 136 by the arm 132 to access various tracks on the media 120 .
- Information is stored on the media 120 in a plurality of stacked tracks (not shown) arranged in sectors on the media 120 , for example, sector 184 .
- each track is composed of a plurality of sectored track portions, for example, sectored track portion 188 .
- Each sectored track portion 188 is composed of recorded data and a header containing a servo-burst-signal pattern, for example, an ABCD-servo-burst-signal pattern, information that identifies the track 176 , and error correction code information.
- a servo-burst-signal pattern for example, an ABCD-servo-burst-signal pattern
- information that identifies the track 176 and error correction code information.
- the read element of the head 110 a of the HGA 110 reads the servo-burst-signal pattern which provides a position-error-signal (PES) to the servo electronics, which controls the electrical signal provided to the voice coil 140 of the VCM, enabling the head 110 a to follow the track 176 .
- PES position-error-signal
- the head 110 a Upon finding the track 176 and identifying a particular sectored track portion 188 , the head 110 a either reads data from the track 176 or writes data to the track 176 depending on instructions received by the disk controller from an external agent, for example, a microprocessor of a computer system.
- an external agent for example, a microprocessor of a computer system.
- the cost per unit of storage, or price per storage capacity from a consumer's standpoint, is especially important in large data storage scenarios (also referred to as “Big Data”), such as with archival and backup storage in which large amounts of data are stored but infrequently accessed (also referred to as “cold storage”).
- Large Data also referred to as “Big Data”
- archival and backup storage in which large amounts of data are stored but infrequently accessed
- cold storage also referred to as “cold storage”.
- Some example approaches to lowering the cost per unit of storage are to use larger diameter disks, more disks per disk stack, and the “elevator drive” with a head stack assembly moving vertically to service a large stack of disks.
- One approach to lowering the cost per unit of storage is to increase the share of the total cost that the media represents, effectively amortizing cost contributors such as the read/write heads, electronics, and the like, over more media capacity and thus more overall storage capacity.
- FIG. 2 is a simplified plan view of a multiple disk stack HDD, according to an embodiment of the invention.
- the internal components of HDD 200 are largely similar to or the same as like components of HDD 100 ( FIG. 1 ).
- FIG. 1 Reference is made to FIG. 1 and the corresponding description for the showing and description of the components of HDD 200 that are like components of HDD 100 .
- HDD 200 comprises multiple disk stacks, i.e., disk stacks 222 a, 222 b, 222 c - 222 n (referred to hereafter collectively as 222 a - 222 n ), where n equals a total number of disk stacks which may vary from implementation to implementation, rather than the typical single disk stack.
- n a total number of disk stacks which may vary from implementation to implementation, rather than the typical single disk stack.
- FIG. 2 for the purpose of clarity, rather than labeling each disk stack the dots depicted around the perimeter of the disk stacks 222 a - 222 n are intended represent a variable set of disk stacks that may be implemented in a multi-disk-stack HDD 200 .
- Each disk stack 222 a - 222 n comprises one or more disk 220 .
- each disk stack 222 a - 222 n would comprise multiple disks, such as ten disks 220 per disk stack 222 a - 222 n, to provide for a large storage capacity HDD.
- the one or more disk 220 of each disk stack 222 a - 222 n are coupled to and rotated by respective spindles, i.e., spindle 224 a - 224 n.
- HDD 200 is configured with ten disk stacks 222 a - 222 n, which is compatible with a standard 19-inch equipment rack and facilitates ease of installation in such a standard sized rack.
- Each disk stack 222 a - 222 n is mounted on or fixed to a rotatable platform, also referred to herein as carousel 230 .
- carousel 230 is rotatable in both clockwise and counter-clockwise directions.
- the particular design e.g., mechanical, electrical, electro-mechanical, etc.
- the particular design utilized to rotate carousel 230 may vary from implementation to implementation.
- carousel 230 is configured to rotate independently of the rotation of the disk spindles 224 a - 224 n .
- carousel 230 and spindles 224 a - 224 n may be rotated simultaneously, although disks 220 would not be accessible for read/write operations as the carousel 230 is rotating.
- HDD 200 further comprises one or more head stack assembly (HSA) 250 to service the disks 220 of disk stacks 222 a - 222 n.
- HSA head stack assembly
- FIG. 2 a single HSA 250 is depicted in FIG. 2 for purposes of simplicity and clarity, HDD 200 may be configured with more than one HSA 250 at one or more respective positions adjacent to and around the perimeter of carousel 230 .
- HSA 250 comprises similar components as shown and described in reference to FIG.
- armature 136 such as armature 136 , voice coil 140 or another type of rotational actuating device, pivot-shaft 148 , pivot-bearing assembly 152 , carriage 134 , arm 132 , head gimbal assembly (HGA) 110 , arm-electronics (AE) module 160 , and flexible interconnect cable 156 .
- HGA head gimbal assembly
- AE arm-electronics
- Each HSA 250 is configured to move a respective one or more head slider to access portions of a magnetic-recording disk 220 of the disk stacks 222 a - 222 n.
- each disk stack 222 a - 222 n is accessed asynchronously, i.e., one disk stack 222 a - 222 n at a time, after the respective disk stack is rotated by the carousel 230 to a fixed position relative to the HSA 250 .
- multiple disk stacks 222 a - 222 n may be accessed simultaneously by a respective HSA 250 after the respective disk stacks are rotated by the carousel 230 to respective fixed positions relative to each respective HSA 250 .
- a particular system or apparatus design (e.g., mechanical, electrical, electro-mechanical, optical, etc.) utilized for rotating the carousel 230 to precisely position, align and temporarily fix each disk stack 222 a - 222 n relative to HSA 250 may vary from implementation to implementation.
- a slot and pin mechanism e.g., a position sensor system, and the like, where a suitable positioning and fixing mechanism may be selected by one skilled in the relevant art based, for example, on the presence of particular design constraints and/or goals.
Landscapes
- Moving Of Heads (AREA)
Abstract
Description
- Embodiments of the invention relate generally to hard disk drive (HDD) storage devices and more particularly to lowering the cost per unit of storage capacity.
- A hard-disk drive (HDD) is a non-volatile storage device that is housed in a protective enclosure and stores digitally encoded data on one or more circular disks having magnetic surfaces. When an HDD is in operation, each magnetic-recording disk is rapidly rotated by a spindle system. Data is read from and written to a magnetic-recording disk using a read/write head that is positioned over a specific location of a disk by an actuator.
- A read/write head uses a magnetic field to read data from and write data to the surface of a magnetic-recording disk. Write heads make use of the electricity flowing through a coil, which produces a magnetic field. Electrical pulses are sent to the write head, with different patterns of positive and negative currents. The current in the coil of the write head induces a magnetic field across the gap between the head and the magnetic disk, which in turn magnetizes a small area on the recording medium.
- While increasing areal density, a measure of the quantity of information bits that can be stored on a given area of disk surface, is one of the ever-present holy grails of HDD design evolution, the cost per unit of storage is also an ever-present constraint associated with HDD development. The cost per storage capacity, or price per capacity from a consumer's standpoint, is especially important in large data storage scenarios, such as with archival and backup storage in which large amounts of data are stored but infrequently accessed.
- Embodiments are directed to a hard disk drive (HDD) having multiple disk stacks fixed to a carousel and one or more head stack assembly (HSA) for accessing portions of one or more magnetic-recording disk of each of the multiple disk stacks. For example, a multiple-disk-stack HDD may be configured with ten disk stacks circularly mounted on the carousel, thereby configured for installation in a standard 19-inch equipment rack. Thus, a lower cost HDD design is described which can be manufactured to have a lower cost per unit of storage.
- Embodiments include an HSA having a single actuator configured to access each disk stack asynchronously, after the carousel rotates to move a disk stack in a fixed position relative to the HSA. Embodiments also include multiple head stack assemblies configured to access multiple disk stacks simultaneously.
- Embodiments discussed in the Summary of Embodiments of the Invention section are not meant to suggest, describe, or teach all the embodiments discussed herein. Thus, embodiments of the invention may contain additional or different features than those discussed in this section.
- Embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar elements and in which:
-
FIG. 1 is a plan view of a conventional hard disk drive (HDD); and -
FIG. 2 is a plan view of a multiple disk stack HDD, according to an embodiment of the invention. - Described herein are approaches to a hard disk drive (HDD) having multiple disk stack assemblies fixed to a rotatable platform, or carousel, and which are serviced by one or more head stack assembly (HSA) after being rotated to a fixed position relative to an HSA. In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the embodiments of the invention described herein. It will be apparent, however, that the embodiments of the invention described herein may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to avoid unnecessarily obscuring the embodiments of the invention described herein.
- Embodiments of the invention relate to a hard-disk drive (HDD). In accordance with an embodiment of the invention, a plan view illustrating a
conventional HDD 100 is shown inFIG. 1 .FIG. 1 illustrates the functional arrangement of components of the HDD including aslider 110 b that includes a magnetic-reading/recording head 110 a. Collectively,slider 110 b andhead 110 a may be referred to as a head slider. TheHDD 100 includes at least one head gimbal assembly (HGA) 110 including the head slider, alead suspension 110 c attached to the head slider, and aload beam 110 d attached to thelead suspension 110 c. The HDD 100 also includes at least one magnetic-recording media 120 rotatably mounted on aspindle 124 and a drive motor (not shown) attached to thespindle 124 for rotating themedia 120. Thehead 110 a includes a write element and a read element for respectively writing and reading information stored on themedia 120 of theHDD 100. Themedia 120 or a plurality of disks may be affixed to thespindle 124 with adisk clamp 128. - The HDD 100 further includes an
arm 132 attached to the HGA 110, acarriage 134, a voice-coil motor (VCM) that includes anarmature 136 including avoice coil 140 attached to thecarriage 134; and astator 144 including a voice-coil magnet (not visible). Thearmature 136 of the VCM is attached to thecarriage 134 and is configured to move thearm 132 and the HGA 110 to access portions of themedia 120 being mounted on a pivot-shaft 148 with an interposed pivot-bearingassembly 152. In the case of an HDD having multiple disks, or platters as disks are sometimes referred to in the art, thecarriage 134 is called an “E-block,” or comb, because the carriage is arranged to carry a ganged array of arms that gives it the appearance of a comb. - An assembly comprising a head gimbal assembly (e.g., HGA 110) including a flexure to which the head slider is coupled, an actuator arm (e.g., arm 132) to which the flexure is coupled, and an actuator (e.g., the VCM) to which the actuator arm is coupled, may be collectively referred to as a head stack assembly (HSA). An HSA may, however, include more or fewer components than those described. For example, an HSA may refer to an assembly that further includes electrical interconnection components. Generally, an HSA is the assembly configured to move the head slider to access portions of the media 120 (e.g., magnetic-recording disks) for read and write operations.
- With further reference to
FIG. 1 , in accordance with an embodiment of the present invention, electrical signals, for example, current to thevoice coil 140 of the VCM, write signal to and read signal from thehead 110 a, are provided by a flexible interconnect cable 156 (“flex cable”). Interconnection between theflex cable 156 and thehead 110 a may be provided by an arm-electronics (AE)module 160, which may have an on-board pre-amplifier for the read signal, as well as other read-channel and write-channel electronic components. The AE 160 may be attached to thecarriage 134 as shown. Theflex cable 156 is coupled to an electrical-connector block 164, which provides electrical communication through electrical feedthroughs provided by anHDD housing 168. TheHDD housing 168, also referred to as a casting, depending upon whether the HDD housing is cast, in conjunction with an HDD cover provides a sealed, protective enclosure for the information storage components of theHDD 100. - With further reference to
FIG. 1 , in accordance with an embodiment of the present invention, other electronic components (not visible), including a disk controller and servo electronics including a digital-signal processor (DSP), provide electrical signals to the drive motor, thevoice coil 140 of the VCM and thehead 110 a of the HGA 110. The electrical signal provided to the drive motor enables the drive motor to spin providing a torque to thespindle 124 which is in turn transmitted to themedia 120 that is affixed to thespindle 124 by thedisk clamp 128; as a result, themedia 120 spins in adirection 172. Thespinning media 120 creates a cushion of air that acts as an air-bearing on which the air-bearing surface (ABS) of theslider 110 b rides so that theslider 110 b flies above the surface of themedia 120 without making contact with a thin magnetic-recording medium in which information is recorded. - The electrical signal provided to the
voice coil 140 of the VCM enables thehead 110 a of the HGA 110 to access atrack 176 on which information is recorded. Thus, thearmature 136 of the VCM swings through anarc 180 which enables the HGA 110 attached to thearmature 136 by thearm 132 to access various tracks on themedia 120. Information is stored on themedia 120 in a plurality of stacked tracks (not shown) arranged in sectors on themedia 120, for example,sector 184. Correspondingly, each track is composed of a plurality of sectored track portions, for example, sectoredtrack portion 188. Eachsectored track portion 188 is composed of recorded data and a header containing a servo-burst-signal pattern, for example, an ABCD-servo-burst-signal pattern, information that identifies thetrack 176, and error correction code information. In accessing thetrack 176, the read element of thehead 110 a of the HGA 110 reads the servo-burst-signal pattern which provides a position-error-signal (PES) to the servo electronics, which controls the electrical signal provided to thevoice coil 140 of the VCM, enabling thehead 110 a to follow thetrack 176. Upon finding thetrack 176 and identifying a particular sectoredtrack portion 188, thehead 110 a either reads data from thetrack 176 or writes data to thetrack 176 depending on instructions received by the disk controller from an external agent, for example, a microprocessor of a computer system. - The cost per unit of storage, or price per storage capacity from a consumer's standpoint, is especially important in large data storage scenarios (also referred to as “Big Data”), such as with archival and backup storage in which large amounts of data are stored but infrequently accessed (also referred to as “cold storage”). Some example approaches to lowering the cost per unit of storage are to use larger diameter disks, more disks per disk stack, and the “elevator drive” with a head stack assembly moving vertically to service a large stack of disks.
- One approach to lowering the cost per unit of storage is to increase the share of the total cost that the media represents, effectively amortizing cost contributors such as the read/write heads, electronics, and the like, over more media capacity and thus more overall storage capacity.
-
FIG. 2 is a simplified plan view of a multiple disk stack HDD, according to an embodiment of the invention. With the exception of components and/or assemblies discussed hereafter, the internal components ofHDD 200 are largely similar to or the same as like components of HDD 100 (FIG. 1 ). Thus, for the purposes of clarity and simplicity, such like components are not necessarily depicted inFIG. 2 or described again in reference toFIG. 2 . Reference is made toFIG. 1 and the corresponding description for the showing and description of the components ofHDD 200 that are like components ofHDD 100. - One difference between
HDD 200 and HDD 100 (FIG. 1 ) is thatHDD 200 comprises multiple disk stacks, i.e., disk stacks 222 a, 222 b, 222 c-222 n (referred to hereafter collectively as 222 a-222 n), where n equals a total number of disk stacks which may vary from implementation to implementation, rather than the typical single disk stack. InFIG. 2 , for the purpose of clarity, rather than labeling each disk stack the dots depicted around the perimeter of the disk stacks 222 a-222 n are intended represent a variable set of disk stacks that may be implemented in a multi-disk-stack HDD 200. Each disk stack 222 a-222 n comprises one ormore disk 220. Preferably but not by way of limitation, each disk stack 222 a-222 n would comprise multiple disks, such as tendisks 220 per disk stack 222 a-222 n, to provide for a large storage capacity HDD. The one ormore disk 220 of each disk stack 222 a-222 n are coupled to and rotated by respective spindles, i.e., spindle 224 a-224 n. - According to an embodiment,
HDD 200 is configured with ten disk stacks 222 a-222 n, which is compatible with a standard 19-inch equipment rack and facilitates ease of installation in such a standard sized rack. - Each disk stack 222 a-222 n is mounted on or fixed to a rotatable platform, also referred to herein as
carousel 230. According to an embodiment,carousel 230 is rotatable in both clockwise and counter-clockwise directions. The particular design (e.g., mechanical, electrical, electro-mechanical, etc.) utilized to rotatecarousel 230 may vary from implementation to implementation. For non-limiting examples, one could implement a direct rotary actuator, a motor and belt mechanism, a gear mechanism, and the like, where a suitable rotating mechanism may be selected by one skilled in the relevant art based, for example, on the presence of particular design constraints and/or goals. Further,carousel 230 is configured to rotate independently of the rotation of the disk spindles 224 a-224 n. However,carousel 230 and spindles 224 a-224 n may be rotated simultaneously, althoughdisks 220 would not be accessible for read/write operations as thecarousel 230 is rotating. -
HDD 200 further comprises one or more head stack assembly (HSA) 250 to service thedisks 220 of disk stacks 222 a-222 n. Although asingle HSA 250 is depicted inFIG. 2 for purposes of simplicity and clarity,HDD 200 may be configured with more than oneHSA 250 at one or more respective positions adjacent to and around the perimeter ofcarousel 230.HSA 250 comprises similar components as shown and described in reference toFIG. 1 , such asarmature 136,voice coil 140 or another type of rotational actuating device, pivot-shaft 148, pivot-bearingassembly 152,carriage 134,arm 132, head gimbal assembly (HGA) 110, arm-electronics (AE)module 160, andflexible interconnect cable 156. - Each
HSA 250 is configured to move a respective one or more head slider to access portions of a magnetic-recording disk 220 of the disk stacks 222 a-222 n. In a single-HSA 250 embodiment, each disk stack 222 a-222 n is accessed asynchronously, i.e., one disk stack 222 a-222 n at a time, after the respective disk stack is rotated by thecarousel 230 to a fixed position relative to theHSA 250. In a multi-HSA 250 embodiment, multiple disk stacks 222 a-222 n may be accessed simultaneously by arespective HSA 250 after the respective disk stacks are rotated by thecarousel 230 to respective fixed positions relative to eachrespective HSA 250. - A particular system or apparatus design (e.g., mechanical, electrical, electro-mechanical, optical, etc.) utilized for rotating the
carousel 230 to precisely position, align and temporarily fix each disk stack 222 a-222 n relative to HSA 250 may vary from implementation to implementation. For non-limiting examples, one could implement a slot and pin mechanism, a position sensor system, and the like, where a suitable positioning and fixing mechanism may be selected by one skilled in the relevant art based, for example, on the presence of particular design constraints and/or goals. - In the foregoing specification, embodiments of the invention have been described with reference to numerous specific details that may vary from implementation to implementation. Thus, the sole and exclusive indicator of what is the invention, and is intended by the applicants to be the invention, is the set of claims that issue from this application, in the specific form in which such claims issue, including any subsequent correction. Any definitions expressly set forth herein for terms contained in such claims shall govern the meaning of such terms as used in the claims. Hence, no limitation, element, property, feature, advantage or attribute that is not expressly recited in a claim should limit the scope of such claim in any way. The specification and drawings are, accordingly, to be regarded in an illustrative rather than a restrictive sense.
Claims (12)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/051,281 US9025277B1 (en) | 2013-10-10 | 2013-10-10 | Hard disk drive having multiple disk stacks on a rotatable platform |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/051,281 US9025277B1 (en) | 2013-10-10 | 2013-10-10 | Hard disk drive having multiple disk stacks on a rotatable platform |
Publications (2)
Publication Number | Publication Date |
---|---|
US20150103433A1 true US20150103433A1 (en) | 2015-04-16 |
US9025277B1 US9025277B1 (en) | 2015-05-05 |
Family
ID=52809447
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/051,281 Active US9025277B1 (en) | 2013-10-10 | 2013-10-10 | Hard disk drive having multiple disk stacks on a rotatable platform |
Country Status (1)
Country | Link |
---|---|
US (1) | US9025277B1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11810600B2 (en) * | 2021-08-18 | 2023-11-07 | Western Digital Technologies, Inc. | Read-write device for an archival data storage library |
US11862203B2 (en) | 2022-01-22 | 2024-01-02 | Western Digital Technologies, Inc. | Disk cartridge data storage library |
Families Citing this family (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11043235B2 (en) | 2018-04-27 | 2021-06-22 | Seagate Technology Llc | Assembly that enables reduction in disk to disk spacing |
US10811045B2 (en) | 2018-04-27 | 2020-10-20 | Seagate Technology Llc | Assembly that enables reduction in disk to disk spacing |
US11423927B2 (en) | 2018-04-27 | 2022-08-23 | Seagate Technology Llc | Assembly that enables reduction in disk to disk spacing |
US10978100B1 (en) | 2018-07-19 | 2021-04-13 | Western Digital Technologies, Inc. | Belt-driven rotary cam elevator mechanism for reduced-head data storage device |
US11410694B2 (en) | 2018-07-19 | 2022-08-09 | Western Digital Technologies, Inc. | Axial flux permanent magnet motor for ball screw cam elevator mechanism for reduced-head hard disk drive |
US11037590B2 (en) | 2018-07-19 | 2021-06-15 | Western Digital Technologies, Inc. | In-pivot hybrid stepper motor for ball screw cam elevator mechanism for reduced-head hard disk drive |
US10902871B2 (en) | 2018-07-19 | 2021-01-26 | Western Digital Technologies, Inc. | Low-profile ball screw cam elevator mechanism for cold storage data storage device |
WO2020018854A1 (en) | 2018-07-19 | 2020-01-23 | Western Digital Technologies, Inc. | Vertically translating load/unload ramp mechanism for cold storage data storage device |
US10930307B2 (en) | 2019-01-14 | 2021-02-23 | Western Digital Technologies, Inc. | Piezoelectric-based locking of actuator elevator mechanism for cold storage data storage device |
WO2021011011A1 (en) | 2019-07-18 | 2021-01-21 | Western Digital Technologies, Inc. | Vertically translating load/unload ramp mechanism for cold storage data storage device |
US11094347B1 (en) | 2020-04-30 | 2021-08-17 | Seagate Technology Llc | Split ramp for data storage devices |
US11031037B1 (en) | 2020-06-12 | 2021-06-08 | Western Digital Technologies, Inc. | System for disk-to-disk access for reduced-head data storage device |
US11756579B2 (en) | 2020-06-24 | 2023-09-12 | Seagate Technology Llc | Moveable ramp for data storage device |
US11308984B2 (en) | 2020-06-24 | 2022-04-19 | Seagate Technology Llc | Retractable ramp for data storage devices |
US10916271B1 (en) | 2020-06-25 | 2021-02-09 | Western Digital Technologies, Inc. | Eliminating lead screw hysteresis for vertically translating load/unload ramp mechanism for data storage device |
US11120834B1 (en) | 2020-09-02 | 2021-09-14 | Seagate Technology Llc | Actuators for an elevator drive |
US11651784B2 (en) | 2020-09-02 | 2023-05-16 | Seagate Technology Llc | Actuators for an elevator drive |
US11443775B1 (en) | 2021-04-20 | 2022-09-13 | Seagate Technology Llc | Hard disc drive with internal access door |
US11842753B2 (en) | 2021-08-20 | 2023-12-12 | Seagate Technology Llc | Jukebox data storage system with inert environment |
US11817125B1 (en) | 2021-10-14 | 2023-11-14 | Seagate Technology Llc | Calibratable brake crawler for multi-disk drives |
US11790946B2 (en) | 2022-02-04 | 2023-10-17 | Seagate Technology Llc | Magnetically repositionable cassettes within a data storage drive |
US20240005952A1 (en) * | 2022-06-30 | 2024-01-04 | Seagate Technology Llc | Data storage system with disk jukebox |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3864747A (en) | 1973-05-29 | 1975-02-04 | Storage Disk Corp | Multiple pack magnetic disk system |
US4019205A (en) | 1974-09-16 | 1977-04-19 | Information Storage Systems, Inc. | Disc drive with rotary access mechanism |
US4566087A (en) * | 1984-05-22 | 1986-01-21 | Casdade Systems Incorporated | Digital optical disk system |
US5343345A (en) | 1992-05-01 | 1994-08-30 | Gilovich Paul A | Magnetic disk storage apparatus with multiple sets of actuator arms for read/write operations at different circumferential locations within the disk stack |
DE69510111T2 (en) | 1994-03-08 | 2000-02-03 | Hitachi Ltd | Disk storage unit |
US5449091A (en) | 1994-03-18 | 1995-09-12 | Storage Technology Corporation | Carousel apparatus for handling data storage cartridges |
US5415471A (en) | 1994-03-18 | 1995-05-16 | Storage Technology Corporation | Carousel-type magnetic tape library system |
SG69991A1 (en) | 1995-11-21 | 2000-01-25 | Thomson Consumer Electronics | Infomational disc handling apparatus for a mltiple disc player |
US6005831A (en) | 1996-11-28 | 1999-12-21 | Daewoo Electronics Co., Ltd | Roulette-type disk changer |
KR19990012980A (en) | 1997-07-31 | 1999-02-25 | 윤종용 | Hard disk drive |
US6115215A (en) | 1998-02-24 | 2000-09-05 | Seagate Technology, Inc. | Balanced actuator which accesses separate disc assemblies |
US6208489B1 (en) | 1998-04-16 | 2001-03-27 | Seagate Technology Llc | Head stack-level load/unload mechanism for rigid disk drives |
JP2001052453A (en) | 1999-08-05 | 2001-02-23 | Minebea Co Ltd | Heat stack assembly and supporting method therefor |
US6628469B1 (en) | 2000-07-11 | 2003-09-30 | International Business Machines Corporation | Apparatus and method for low power HDD storage architecture |
US7475409B2 (en) | 2003-05-12 | 2009-01-06 | Onkyo Corporation | Disc changer device |
US20060044663A1 (en) | 2004-09-01 | 2006-03-02 | Stiles Enrique M | Hard disk drive with multiple spindles |
US8028311B2 (en) | 2004-10-18 | 2011-09-27 | Gilovich Paul A | Multiple positioner data storage device |
CN1937066A (en) | 2005-09-21 | 2007-03-28 | 鸿富锦精密工业(深圳)有限公司 | Multi-CD player detection device and method therefor |
US7760463B2 (en) | 2006-12-19 | 2010-07-20 | Teradata Us, Inc. | Multiple disks in a single disk package |
JP2009070425A (en) * | 2007-09-10 | 2009-04-02 | Fujitsu Ltd | Storage device |
US8112580B2 (en) | 2009-01-19 | 2012-02-07 | Hitachi Global Storage Technologies Netherlands B.V. | Disk drive having multiple disk surfaces accessible by a read/write head and nonvolatile memory for continuous data transfer |
US9343107B2 (en) | 2009-11-20 | 2016-05-17 | Seagate Technology Llc | Windage control in a dual spindle storage device having interleaved storage media |
-
2013
- 2013-10-10 US US14/051,281 patent/US9025277B1/en active Active
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11810600B2 (en) * | 2021-08-18 | 2023-11-07 | Western Digital Technologies, Inc. | Read-write device for an archival data storage library |
US11862203B2 (en) | 2022-01-22 | 2024-01-02 | Western Digital Technologies, Inc. | Disk cartridge data storage library |
Also Published As
Publication number | Publication date |
---|---|
US9025277B1 (en) | 2015-05-05 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9025277B1 (en) | Hard disk drive having multiple disk stacks on a rotatable platform | |
US8958172B1 (en) | Multiple disk stack, single actuator hard disk drive | |
US8824094B1 (en) | Hard disk drive having multiple disk stacks and a movable head stack assembly | |
US8958173B1 (en) | Hard disk drive having multiple movable disk stacks on a guide rail | |
US9552835B1 (en) | Actuator limiters for multiple disk-stack, shared actuator hard disk drive | |
US9704521B1 (en) | Actuator limiters for multiple disk-stack, shared actuator hard disk drive | |
US9218833B1 (en) | Load/unload ramps for multiple disk-stack, shared actuator hard disk drive | |
US9183862B1 (en) | Load/unload ramps for multiple disk-stack, shared actuator hard disk drive | |
US10186286B2 (en) | Techniques for reducing dynamic coupling of system modes in a dual actuator hard disk drive | |
US9218834B2 (en) | Dual stage microactuator flexure feature for minimizing electrical shorts | |
US9449623B2 (en) | Reducing ion migration in a hard disk drive microactuator flexure assembly | |
US8339732B2 (en) | Baseplate with recessed region in a hard-disk drive (HDD) | |
US20120140360A1 (en) | Integrated lead suspension (ils) for use with a dual stage actuator (dsa) | |
US9460757B2 (en) | Flexible cable assembly having reduced-tolerance electrical connection pads | |
US8351159B2 (en) | Suspension for protecting a component from mechanical shock | |
US20160365105A1 (en) | Hard Disk Drive Actuator Pivot To Base Tower Clearance Spacer Mechanism | |
US11430474B1 (en) | Hard disk drive suspension tail having narrowing tip | |
US8958179B1 (en) | Managing resonance frequency of hard disk drive voice coil motor | |
US20160358621A1 (en) | Self-Servo Write Non-Reference Head Position Measuring | |
US9245546B1 (en) | Contamination mitigation cap for a hard disk drive actuator pivot assembly | |
US10056117B1 (en) | Data storage device baseplate diverter and downstream spoiler | |
US8355220B2 (en) | Upstream spoiler with integrated crash stop | |
US20150332728A1 (en) | Hard Disk Drive Base Having Vibration Propagation Mitigation Feature | |
US9019655B1 (en) | Hard disk drive disk clamp having reduced radial stiffness | |
US11081130B1 (en) | Suspension standoff arrangement for confining adhesive |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: HGST NETHERLANDS B.V., NETHERLANDS Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HIRANO, TOSHIKI;REEL/FRAME:031385/0238 Effective date: 20131007 |
|
FEPP | Fee payment procedure |
Free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
|
STCF | Information on status: patent grant |
Free format text: PATENTED CASE |
|
AS | Assignment |
Owner name: WESTERN DIGITAL TECHNOLOGIES, INC., CALIFORNIA Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HGST NETHERLANDS B.V.;REEL/FRAME:040829/0516 Effective date: 20160831 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 4TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1551); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 4 |
|
AS | Assignment |
Owner name: JPMORGAN CHASE BANK, N.A., AS AGENT, ILLINOIS Free format text: SECURITY INTEREST;ASSIGNOR:WESTERN DIGITAL TECHNOLOGIES, INC.;REEL/FRAME:052915/0566 Effective date: 20200113 |
|
AS | Assignment |
Owner name: WESTERN DIGITAL TECHNOLOGIES, INC., CALIFORNIA Free format text: RELEASE OF SECURITY INTEREST AT REEL 052915 FRAME 0566;ASSIGNOR:JPMORGAN CHASE BANK, N.A.;REEL/FRAME:059127/0001 Effective date: 20220203 |
|
MAFP | Maintenance fee payment |
Free format text: PAYMENT OF MAINTENANCE FEE, 8TH YEAR, LARGE ENTITY (ORIGINAL EVENT CODE: M1552); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY Year of fee payment: 8 |
|
AS | Assignment |
Owner name: JPMORGAN CHASE BANK, N.A., ILLINOIS Free format text: PATENT COLLATERAL AGREEMENT - A&R LOAN AGREEMENT;ASSIGNOR:WESTERN DIGITAL TECHNOLOGIES, INC.;REEL/FRAME:064715/0001 Effective date: 20230818 Owner name: JPMORGAN CHASE BANK, N.A., ILLINOIS Free format text: PATENT COLLATERAL AGREEMENT - DDTL LOAN AGREEMENT;ASSIGNOR:WESTERN DIGITAL TECHNOLOGIES, INC.;REEL/FRAME:067045/0156 Effective date: 20230818 |