US Patent No: 5,596,458
Number of patents in Portfolio can not be more than 2000
Variable zone layout for information storage disk drive
Stats
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Jan 21, 1997
Issued date -
Dec 19, 1994
filing date -
08/359,111
serial no -
In Force
status
Importance
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Abstract
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
Related Publications
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International Classification(s)
- [Classification Symbol]
- [Patents Count]
Cited Art
| Patent Info | (Count) | # Cites | Year |
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| 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 | 68 | 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 | 213 | 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 | 41 | 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 | 88 | 1989 | |
| 5,025,336 Disk drive apparatus | 122 | 1989 | |
| 5,023,737 Disc drive slider lifter using shape memory materials | 47 | 1990 | |
| 5,182,682 Sectored servo disk formatting | 18 | 1992 | |
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| 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 | 157 | 1986 | |
| 4,783,705 High capacity disk file with embedded sector servo and SCSI interface | 114 | 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 | 143 | 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 | 162 | 1990 | |
| 5,384,671 PRML sampled data channel synchronous servo detector | 136 | 1993 | |
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| 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 | 186 | 1991 | |
| 5,264,975 Magnetic disk storage device with the base provided by an electronic module substrate | 48 | 1992 | |
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| 4,658,308 Method and apparatus for retracting head and braking motor of a disc drive device | 44 | 1986 | |
| 4,894,734 Method and apparatus for constant density recording | 56 | 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 | 58 | 1991 | |
| 5,339,207 Servo system for providing increased recording density and improved operation of the AGC circuitry | 38 | 1992 | |
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| 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 | 80 | 1989 | |
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| 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 | |
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| 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 | 38 | 1989 | |
| 5,036,416 Aerodynamically releasable lock for a disk file actuator assembly | 54 | 1990 | |
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| 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 | |
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| 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 | 80 | 1989 | |
| 5,237,553 Data recording and reproducing apparatus having a plurality of operating modes | 235 | 1991 | |
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| 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 | |
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| 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 | |
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| 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 | |
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| 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 | |
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| 4,535,374 Whitney-type head loading/unloading apparatus | 117 | 1982 | |
| 4,628,379 Disk runout compensator | 44 | 1984 | |
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| 4,424,543 Method and apparatus for recording transducer positioning information | 87 | 1981 | |
| 4,530,019 Servo pattern | 75 | 1984 | |
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| 4,627,288 Bearing unloading mechanism for disc clamping unit | 23 | 1985 | |
| 4,958,839 Disc clamp employing resilient cone for spreading balls | 49 | 1988 | |
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| 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 | |
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| 4,497,003 Disc positioning device | 19 | 1982 | |
| 5,014,142 Magnetic disk apparatus with head supporting structures of different proper oscillations | 26 | 1989 | |
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| 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 | |
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| 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 | 143 | 1989 | |
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| 4,920,528 Method of disk recording using alternative recording tracks | 13 | 1987 | |
| 4,920,437 Disc clamping device | 18 | 1987 | |
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| 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 | |
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| 4,824,059 Cushioning device for remote control television equipment, and assembly thereof | 80 | 1988 | |
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| 4,736,358 Recording medium clamping apparatus | 26 | 1986 | |
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| 5,023,736 Magnetic latch for disk drive actuator | 64 | 1989 | |
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| 5,025,335 Architecture for 21/2 inch diameter single disk drive | 161 | 1989 | |
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| 4,530,020 Self-timed runout correction pattern | 42 | 1984 | |
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| 4,663,682 Apparatus for loading and unloading a magnetic head assembly on a magnetic recording surface | 72 | 1983 | |
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| 4,539,614 Flexible magnetic disk clamping an injector mechanism | 33 | 1983 | |
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| 4,901,173 Apparatus for coupling record disk to disk drive | 82 | 1988 | |
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| 4,724,501 Jacket for floppy disk | 25 | 1985 | |
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| 4,379,316 Read/write head carriage assembly for a floppy disk drive | 32 | 1981 | |
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| 4,984,100 Magnetic disk apparatus | 77 | 1989 | |
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| 5,237,472 Rigid disk drive with dynamic head loading apparatus | 66 | 1991 | |
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| 4,870,703 Magnetic disc memory unit | 74 | 1988 | |
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| 4,825,310 Method and apparatus for recording servo synchronization information | 23 | 1986 | |
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| 4,409,629 Mechanism for centering and clamping a floppy disc | 30 | 1981 | |
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| 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 | |
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| 4,568,994 Warp resistant-dimensionally stable jacket for magnetic recording disk | 26 | 1983 | |
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| 4,655,348 Magnetic recording disc-jacket assembly | 28 | 1984 | |
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| 4,833,665 Information recording control system reusing a defective area | 50 | 1987 | |
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| 5,023,857 Optical information storage apparatus including eccentricity compensator | 23 | 1988 | |
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| 4,786,995 Automatic head retract system for disk drive | 67 | 1986 | |
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| 4,772,974 Compact head and disk assembly | 60 | 1987 | |
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| 5,001,700 Disk clamp and centering apparatus for a beam addressable disk drive system | 37 | 1989 | |
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| 4,568,988 Micro hard-disk drive system | 73 | 1984 | |
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| 4,518,904 Stepper motor control for data disk system | 40 | 1984 | |
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| 4,752,848 Spacing device for magnetic recording and/or reading head-holder pads in a disc memory apparatus | 36 | 1986 | |
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| 4,943,748 Motor with cup-shaped rotor having cylindrical portions of different diameter | 40 | 1989 | |
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| 4,716,480 Carriage latch for a disc drive | 31 | 1986 | |
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| 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 | |
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| 4,502,136 Apparatus for centering and clamping an information recording disk in a data storage device | 29 | 1983 | |
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| 4,420,830 Disc mounting and centering device | 42 | 1981 | |
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| 4,510,592 Disk clamping device | 30 | 1984 | |
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| 4,495,533 Disk memory indexing system | 25 | 1982 | |
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| 4,703,371 Disk drive formatting | 15 | 1985 | |
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| 4,827,364 Self-compensating media centering and clamping mechanism for floppy disk drives | 18 | 1984 | |
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| 4,705,279 Device for clamping a flexible disk | 35 | 1986 | |
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| 4,473,153 Flexible disk cartridge envelope | 101 | 1982 | |
| 4,515,272 Rosin bar holder | 42 | 1983 | |
| 4,755,981 Spindle clamp for removable disks | 40 | 1987 | |