US Patent No: 5,870,237

Number of patents in Portfolio can not be more than 2000

Method for variable zone layout for information storage disk drive

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Abstract

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A magnetic recording system utilizing a plurality of surfaces on a magnetic recording disk with recording zone boundaries established on the respective surfaces of the disk based on the performance characteristic of the read/write head associated with the surface. Since the zone boundaries are established uniquely for the performance of each head rather than by defining the boundaries of all zones for all surfaces in advance based on an assumed performance characteristic of the heads, the zone boundaries on one surface of the disk will not necessarily align with the zone boundaries on another surface of the disk. Similarly, when a plurality of disks are utilized, the zone boundaries will not necessarily be aligned. Improved utilization of the available stroke on the disk drive permits further improvement in recording density.

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First Claim

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MOBILE STORAGE TECHNOLOGY INC.BOULDER, CO76

International Classification(s)

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chenkin, Nelson Fort Collins, CO 5 127
Emo, Bruce D Boulder, CO 31 536
Wilson, Brian D Boulder, CO 59 424

Cited Art Landscape

Patent Info (Count) # Cites Year
 
SEAGATE TECHNOLOGY LLC (17)
4,679,102 Method and means for parking read/write heads in a disc drive using the back-EMF of the spindle motor to operate a stepper motor 55 1985
4,725,907 Carriage latch for a disc drive incorporating inertial lock-up 37 1986
4,803,580 Double-gap magnetoresistive head having an elongated central write/shield pole completely shielding the magnetoresistive sensor strip in the read gap 81 1987
4,799,112 Method and apparatus for recording data 69 1987
4,979,056 Disk drive system controller architecture 47 1987
4,864,443 Disc clamping device 48 1987
4,965,684 Low height disk drive 107 1988
4,933,785 Disk drive apparatus using dynamic loading/unloading 214 1988
4,969,059 Offset nulling system for computer disk drives 54 1988
4,977,472 Servo address system 57 1988
4,945,311 Electronically variable equalizer 22 1988
4,996,617 Disc drive safety latch using shape memory metals 42 1989
5,050,016 Disk drive servo system using gain limited high-frequency track-following compensator 59 1989
4,979,055 Disk drive system controller architecture utilizing embedded real-time diagnostic monitor 90 1989
5,025,336 Disk drive apparatus 126 1989
5,023,737 Disc drive slider lifter using shape memory materials 48 1990
5,182,682 Sectored servo disk formatting 20 1992
 
MAXTOR CORPORATION (10)
4,516,177 Rotating rigid disk data storage device 77 1983
4,647,997 Aerodynamic latch for disk file actuator 75 1985
4,669,004 High capacity disk file with embedded sector servo 158 1986
4,783,705 High capacity disk file with embedded sector servo and SCSI interface 116 1987
4,825,321 Modular unitary disk file subsystem having increased data storage capacity 34 1987
4,858,034 Modular unitary disk file subsystem with differing density zones 40 1988
5,041,924 Removable and transportable hard disk subsystem 156 1988
5,170,299 Edge servo for disk drive head positioner 101 1990
5,027,241 Data head load beam for height compacted, low power fixed head and disk assembly 166 1990
5,384,671 PRML sampled data channel synchronous servo detector 141 1993
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (7)
4,297,737 Sector servo with sync marks 48 1979
4,396,960 Servo track following control for magnetic heads, and method for compensating uniform disturbance variables 15 1981
4,413,251 Method and apparatus for generating a noiseless sliding block code for a (1,7) channel with rate 2/3 73 1981
4,578,723 Head positioning system with automatic gain control 42 1983
4,839,756 Apparatus for read/write head loading and unloading in a data recording disk file 44 1988
5,235,585 Reassigning defective sectors on a disk 190 1991
5,264,975 Magnetic disk storage device with the base provided by an electronic module substrate 48 1992
 
NEC CORPORATION (5)
4,658,308 Method and apparatus for retracting head and braking motor of a disc drive device 46 1986
4,894,734 Method and apparatus for constant density recording 58 1987
4,999,720 Zone density sector counter 24 1989
5,257,143 Method and apparatus for positioning head of disk drive using zone-bit-recording 59 1991
5,339,207 Servo system for providing increased recording density and improved operation of the AGC circuitry 38 1992
 
ALPS ELECTRIC CO., LTD. (4)
4,747,002 Disk clamping mechanism 24 1986
4,760,477 Disk clamping mechanism for a disk driving device 20 1986
4,876,618 Method for detecting zero track 10 1987
5,075,804 Management of defect areas in recording media 81 1989
 
EASTMAN KODAK COMPANY (3)
4,714,967 Binarily related variable rate recorder 30 1985
4,750,059 Data recording format for an information-bearing disk 45 1986
4,780,866 Method and apparatus combining an information-bearing disk and a disk drive mechanism 32 1988
 
HEWLETT-PACKARD COMPANY (3)
4,823,212 Sampled servo code format and system for a disc drive 105 1986
5,041,926 Track position syncopation cancellation in a disk drive 39 1989
5,036,416 Aerodynamically releasable lock for a disk file actuator assembly 54 1990
 
KABUSHIKI KAISHA TOSHIBA (3)
4,641,294 Method and apparatus for performing a memory operation on a fixed length block of data on a memory disk 32 1984
4,907,214 Eccentricity correction apparatus for an optical disk device 30 1986
4,819,103 Apparatus for reproducing data from magnetic recording medium 28 1987
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (3)
4,873,679 Optical information recording disk and optical information recording disk apparatus 83 1987
4,984,230 Rewritable optical disk with defective-sector substitution arrangement and optical information recording and reproducing system 81 1989
5,237,553 Data recording and reproducing apparatus having a plurality of operating modes 236 1991
 
MOBILE STORAGE TECHNOLOGY INC. (3)
5,189,576 Rotary inertial latch for disk drive actuator 42 1990
5,218,253 Spin motor for a hard disk assembly 16 1990
5,321,560 Embedded servo system for low power disk drives 25 1991
 
Pioneer Electronic Corporation (3)
4,734,813 Clamper holding mechanism for positioning an information recording disk 21 1985
4,829,501 Clamper for disk player 29 1988
4,841,517 Disk clamping device 25 1988
 
SYQUEST TECHNOLOGY, INC. (3)
4,683,506 Disc drive arrangement for a hard disc cartridge with a read/write head retract mechanism 87 1983
4,630,190 Servo control apparatus for a disk drive 37 1984
4,920,462 Disc drive fine servo velocity control and method for head positioning relative to a disc 48 1988
 
U.S. Philips Corporation (3)
4,443,874 Information-disc cassette 43 1982
4,649,531 Apparatus for centering, aligning and clamping an optical disc 28 1985
4,799,209 Clamping device for clamping an optical disc onto a drive spindle 29 1987
 
Amcodyne Incorporated (2)
4,535,374 Whitney-type head loading/unloading apparatus 120 1982
4,628,379 Disk runout compensator 44 1984
 
CAMBRIAN CONSULTANTS INC. (2)
4,424,543 Method and apparatus for recording transducer positioning information 87 1981
4,530,019 Servo pattern 75 1984
 
GUZIK TECHNICAL ENTERPRISES (2)
4,627,288 Bearing unloading mechanism for disc clamping unit 23 1985
4,958,839 Disc clamp employing resilient cone for spreading balls 50 1988
 
HITACHI GLOBAL STORAGE TECHNOLOGIES NETHERLANDS B.V. (2)
4,594,622 Track following servo system for a disk file 68 1984
5,072,318 Disk file with adaptive cancellation of nonrepeatable disk runout 46 1990
 
HITACHI, LTD. (2)
4,497,003 Disc positioning device 19 1982
5,014,142 Magnetic disk apparatus with head supporting structures of different proper oscillations 26 1989
 
MITSUBISHI DENKI KABUSHIKI KAISHA (2)
4,772,972 Magnetic disc apparatus with head assembly aligning mechanism 23 1987
5,212,604 Method and apparatus for processing positioning signals in a record 12 1990
 
RS PATENT HOLDING CORP. (2)
4,638,383 Micro hard-disk drive system 60 1985
5,034,837 Magnetic disk drive incorporating a magnetic actuator lock and a very small form factor 144 1989
 
SHARP KABUSHIKI KAISHA (2)
4,920,528 Method of disk recording using alternative recording tracks 13 1987
4,920,437 Disc clamping device 18 1987
 
Tokyo Shibaura Denki Kabushiki Kaisha (2)
4,530,018 Information recording/reproducing apparatus with disk having sections of different angular velocity 46 1982
4,631,606 System for detecting the position of a read-write head on a disk recording medium having servo sectors with three or more servo patterns 43 1984
 
BUTLER, STEPHEN, W. (1)
4,824,059 Cushioning device for remote control television equipment, and assembly thereof 81 1988
 
CANON DENSHI KABUSHIKI KAISHA (1)
4,736,358 Recording medium clamping apparatus 26 1986
 
CIT GROUP/BUSINESS CREDIT, INC. (1)
5,023,736 Magnetic latch for disk drive actuator 64 1989
 
CONNER PERIPHERALS (1)
5,025,335 Architecture for 21/2 inch diameter single disk drive 163 1989
 
DELAWARE CAPITAL FORMATION, INC. (1)
4,530,020 Self-timed runout correction pattern 42 1984
 
DMA SYSTEMS, INC. (1)
4,663,682 Apparatus for loading and unloading a magnetic head assembly on a magnetic recording surface 72 1983
 
Drivetec, Inc. (1)
4,539,614 Flexible magnetic disk clamping an injector mechanism 34 1983
 
E/M CORPORATION (1)
4,901,173 Apparatus for coupling record disk to disk drive 82 1988
 
Firma Carl Freudenberg (1)
4,724,501 Jacket for floppy disk 25 1985
 
FORESTLANE CO., LTD. (1)
4,379,316 Read/write head carriage assembly for a floppy disk drive 32 1981
 
HITACHI GLOBAL STORAGE TECHNOLOGIES JAPAN, LTD. (1)
4,984,100 Magnetic disk apparatus 77 1989
 
INTEGRAL PERIPHERALS, A CORP. OF DE (1)
5,237,472 Rigid disk drive with dynamic head loading apparatus 66 1991
 
Kaman Aerospace Corporation (1)
4,870,703 Magnetic disc memory unit 74 1988
 
Konica Corporation (1)
4,825,310 Method and apparatus for recording servo synchronization information 23 1986
 
Magnum Division of Tandon Corporation (1)
4,409,629 Mechanism for centering and clamping a floppy disc 31 1981
 
MATSUSHITA GRAPHIC COMMUNICATION SYSTEMS, INC. (1)
5,319,627 Method for managing a defect in an optical disk by assigning logical addresses based upon cumulative number of defects in the disk 84 1991
 
Memron, Inc. (1)
4,568,994 Warp resistant-dimensionally stable jacket for magnetic recording disk 26 1983
 
Mitsubishi Plastics Industries Limited (1)
4,655,348 Magnetic recording disc-jacket assembly 28 1984
 
Nippon T & T (1)
4,833,665 Information recording control system reusing a defective area 51 1987
 
OPTICAL STORAGE INTERNATIONAL HOLLAND, A CORP. OF THE NETHERLANDS (1)
5,023,857 Optical information storage apparatus including eccentricity compensator 23 1988
 
PERIPHERAL TECHNOLOGY INC. (1)
4,786,995 Automatic head retract system for disk drive 69 1986
 
QUANTUM CORPORATION (1)
4,772,974 Compact head and disk assembly 60 1987
 
RESEARCH INVESTMENT NETWORK, INC. (1)
5,001,700 Disk clamp and centering apparatus for a beam addressable disk drive system 37 1989
 
RODIME PLC ROTHESAY HOUSE, ROTHESAY PLACE, GLENROTHES, KY7 6PW, FIFE SCOTLAND (1)
4,568,988 Micro hard-disk drive system 73 1984
 
RODIME, PLC. (1)
4,518,904 Stepper motor control for data disk system 40 1984
 
SAGEM SA (1)
4,752,848 Spacing device for magnetic recording and/or reading head-holder pads in a disc memory apparatus 36 1986
 
SANKYO SEIKI MFG. CO., LTD. (1)
4,943,748 Motor with cup-shaped rotor having cylindrical portions of different diameter 40 1989
 
SEAGATE TECHNOLOGY, SCOTTS VALLEY, CA. A CORP. OF CA. (1)
4,716,480 Carriage latch for a disc drive 31 1986
 
SONY CORPORATION (1)
4,789,975 Apparatus for recording and/or reproducing data signal on or from disk shaped recording medium at a variably selected constant linear velocity 41 1987
 
STUFF TECHNOLOGY PARTNERS II, LTD. (1)
4,502,136 Apparatus for centering and clamping an information recording disk in a data storage device 29 1983
 
UNISYS CORPORATION (1)
4,420,830 Disc mounting and centering device 43 1981
 
Universal Pioneer Corporation (1)
4,510,592 Disk clamping device 30 1984
 
WESTERN DIGITAL (SINGAPORE) PTE LTD. (1)
4,495,533 Disk memory indexing system 25 1982
 
Xebec (1)
4,703,371 Disk drive formatting 15 1985
 
XEROX CORPORATION (1)
4,827,364 Self-compensating media centering and clamping mechanism for floppy disk drives 18 1984
 
YE DATA INC. (1)
4,705,279 Device for clamping a flexible disk 36 1986
 
Other [Check patent profile for assignment information] (3)
4,473,153 Flexible disk cartridge envelope 101 1982
4,515,272 Rosin bar holder 46 1983
4,755,981 Spindle clamp for removable disks 41 1987

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
WESTERN DIGITAL TECHNOLOGIES, INC. (12)
7,209,310 Disk drive identifying starting track by performing multiple load operations 4 2005
7,436,610 Disk drive employing different zone boundaries across disk surfaces 10 2005
8,134,798 Disk drive maintaining a substantially constant host transfer rate when reading data from varying data rate data tracks across multiple disk surfaces 1 2005
7,872,822 Disk drive refreshing zones based on serpentine access of disk surfaces 7 2007
8,174,780 Disk drive biasing a refresh monitor with write parameter of a write operation 1 2007
7,945,727 Disk drive refreshing zones in segments to sustain target throughput of host commands 4 2007
7,688,540 Disk drive selecting TPI profile by estimating head geometry 10 2007
7,982,993 Disk drive employing different servo TPI to data TPI ratios across the disk surface 7 2008
8,116,020 Disk drive mapping entries of a defect list into clusters 3 2009
8,031,423 Disk drive generating actual data TPI profile by combining segments of predetermined data TPI profiles 5 2009
7,974,029 Disk drive biasing refresh zone counters based on write commands 5 2009
8,630,052 Disk drive calibrating radial density then adjusting linear density to balance off-track read capability 0 2011
 
SEAGATE TECHNOLOGY LLC (8)
5,999,352 Variable bits per inch recording 9 1997
6,560,052 Implementation of variable bit density recording in storage disc drives 27 1999
6,446,156 Proposal of capacity tuning in the production process of storage disc drives 7 1999
6,633,442 Adjusting track density and bit density to provide limited excess capacity in a storage device 7 2001
6,751,036 Tuning track density for data storage device 13 2001
7,046,471 Method and apparatus for utilizing variable tracks per inch to reduce bits per inch for a head 11 2003
7,529,054 Adaptive recording band expansion methodology 1 2004
7,589,925 Method of accessing variable density data tracks in a disk drive 3 2006
 
TOSHIBA STORAGE DEVICE CORPORATION (3)
7,317,587 Magnetic disk devices with data recording areas set separately for each device 1 2005
7,620,771 Magnetic disk apparatus, method for adjusting performance of magnetic disk apparatus, and method for accessing magnetic disk 0 2005
7,706,091 Magnetic disk devices with data recording areas set separately for each device 2 2007
 
MAXTOR CORPORATION (2)
7,283,316 Vertical track zoning for disk drives 8 2003
7,362,529 Disk drive with variable density data tracks 5 2006
 
INTERNATIONAL BUSINESS MACHINES CORPORATION (1)
6,418,512 Method and system for reporting disk utilizations for disk subsystems 0 1999
 
KABUSHIKI KAISHA TOSHIBA (1)
7,656,598 Method and apparatus for setting storage capacity of recording media 1 2006
 
SAMSUNG ELECTRONICS CO., LTD. (1)
6,084,732 Method of selecting zone lay-out of a hard disk drive on basis of head/recording medium performance 6 1997
 
SEAGATE TECHNOLOGY INTERNATIONAL (1)
8,279,547 Method of setting zone layout of recording medium, and apparatus using method 0 2010
 
TEXAS INSTRUMENTS INCORPORATED (1)
6,795,264 LBA tracking for system data management 4 2001