Inventor
NG SPENCER W
US22 patents
⚠️ This page may combine multiple inventors who share the name “NG SPENCER W”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
IBM
11 patentsUS5258984ANov 2, 1993
Method and means for distributed sparing in DASD arrays
IBM166 citations98
US5278838AJan 11, 1994
Recovery from errors in a redundant array of disk drives
IBM170 citations97
US5991825ANov 23, 1999
System for handling missed revolution in a disk drive by aborting the execution of primary command and executing secondary command if a missed revolution occurs
IBM65 citations96
US5412661AMay 2, 1995
Two-dimensional disk array
IBM78 citations95
USRE36846EAug 29, 2000
Recovery from errors in a redundant array of disk drives
IBM59 citations94
US7085953B1Aug 1, 2006
Method and means for tolerating multiple dependent or arbitrary double disk failures in a disk array
IBM45 citations92
US5341351AAug 23, 1994
Method and means for optimally accessing data residing on dual actuator DASDs
IBM33 citations92
US5566317AOct 15, 1996
Method and apparatus for computer disk drive management
IBM26 citations91
US6928515B2Aug 9, 2005
Integrated sector format-error correction code system and method for efficient writing in a disk array system
IBM12 citations84
US6253279B1Jun 26, 2001
Method and system for determining the data layout geometry of a disk drive
IBM5 citations63
US6237070B1May 22, 2001
Method and system for determining the data layout geometry of a disk drive
IBM4 citations63
HITACHI GLOBAL STORAGE TECH
6 patentsUS7411757B2Aug 12, 2008
Disk drive with nonvolatile memory having multiple modes of operation
HITACHI GLOBAL STORAGE TECH73 citations97
US7318118B2Jan 8, 2008
System and method for selective write to flash memory in HDD
HITACHI GLOBAL STORAGE TECH38 citations92
US7137038B2Nov 14, 2006
System and method for autonomous data scrubbing in a hard disk drive
HITACHI GLOBAL STORAGE TECH38 citations92
US7080200B2Jul 18, 2006
System and method for handling writes in HDD using 4K block sizes
HITACHI GLOBAL STORAGE TECH36 citations92
US7472222B2Dec 30, 2008
HDD having both DRAM and flash memory
HITACHI GLOBAL STORAGE TECH46 citations89
US7545596B2Jun 9, 2009
System and method for WORM magnetic recording
HITACHI GLOBAL STORAGE TECH0 citations50
HITACHI GLOBAL STORAGE TECH NL
3 patentsUS8024515B2Sep 20, 2011
Non-volatile cache in disk drive emulation
HITACHI GLOBAL STORAGE TECH NL26 citations91
US8015433B2Sep 6, 2011
Disk drive with nonvolatile memory for storage of failure-related data
HITACHI GLOBAL STORAGE TECH NL17 citations83
US8014095B2Sep 6, 2011
Mixed format disk drive
HITACHI GLOBAL STORAGE TECH NL1 citations51