Inventor
GREENBERG RICHARD
US21 patents
Patents
21 patentsUS5875454AFeb 23, 1999
Compressed data cache storage system
IBM284 citations99
US5615064AMar 25, 1997
Pulsed current velocity controlled head load method and apparatus which uses the back EMF to control the generation of head actuator driving pulses
IBM89 citations94
US5392290AFeb 21, 1995
System and method for preventing direct access data storage system data loss from mechanical shock during write operation
IBM67 citations94
US4656532AApr 7, 1987
Sector identification method for hard sectored hard files
IBM61 citations94
US5264975ANov 23, 1993
Magnetic disk storage device with the base provided by an electronic module substrate
IBM69 citations93
US6219814B1Apr 17, 2001
Method and apparatus for selectively varying error correcting code (ECC) power in a direct access storage device (DASD)
IBM46 citations92
US6104558AAug 15, 2000
System and method of encoding an index mark into a servo address
IBM20 citations92
US5828513AOct 27, 1998
Servo address apparatus and positioning methods for read, write and seek operations in a direct access storage device
IBM23 citations92
US5619387AApr 8, 1997
Disk storage device with spiral data track and incremental error offsets in angularly spaced imbedded concentric servo patterns
IBM33 citations92
US5596460AJan 21, 1997
System and method for encoding a servo address
IBM27 citations92
US5343340AAug 30, 1994
Digital servo signal demodulation method and apparatus utilizing a partial-response maximum-likelihood (PRML) channel in a disk file
IBM38 citations92
US5237466AAug 17, 1993
Method and apparatus for programmably controlling spindle synchronization and phase among disk drives in a storage subsystem
IBM40 citations91
US5081552AJan 14, 1992
Rigid magnetic disk drive head disk assembly and enclosure structure
IBM48 citations91
US6035351AMar 7, 2000
Storage of user defined type file data in corresponding select physical format
IBM41 citations90
US5289097AFeb 22, 1994
Spindle control method and apparatus for disk drive
IBM43 citations88
US5986852ANov 16, 1999
High capacity, high performance low profile disk drive
IBM41 citations87
US6496877B1Dec 17, 2002
Method and apparatus for scheduling data accesses for random access storage devices with shortest access chain scheduling algorithm
IBM18 citations84
US6016234AJan 18, 2000
Actuator retract/unload system for low power disk drives
IBM16 citations82
US6079044AJun 20, 2000
Method and error correcting code (ECC) apparatus for storing predefined information with ECC in a direct access storage device
IBM9 citations74
US5757568AMay 26, 1998
System and method for encoding a servo address
IBM10 citations73
US6438703B1Aug 20, 2002
Method and system for selectively varying signal delay in response to detection of a quiescent signal
IBM7 citations72