Inventor
KURANO AKIRA
JP32 patents
Patents
32 patentsUS5226157AJul 6, 1993
Backup control method and system in data processing system using identifiers for controlling block data transfer
HITACHI LTD1,461 citations99
US6230239B1May 8, 2001
Method of data migration
HITACHI LTD161 citations98
US4688221AAug 18, 1987
Error recovery method and apparatus
HITACHI LTD221 citations98
US6374327B2Apr 16, 2002
Method of data migration
HITACHI LTD80 citations97
US5253351AOct 12, 1993
Memory controller with a cache memory and control method of cache memory including steps of determining memory access threshold values
HITACHI LTD132 citations97
US6269424B1Jul 31, 2001
Disk array device with selectable method for generating redundant data
HITACHI LTD43 citations96
US5734812AMar 31, 1998
Storage unit with parity generation function and storage systems using storage unit with parity generation analyzation
HITACHI LTD34 citations96
US5119488AJun 2, 1992
Input/output system implementing several access paths for rerouting data in the event one path fails
HITACHI LTD59 citations96
US4800483AJan 24, 1989
Method and system for concurrent data transfer disk cache system
HITACHI LTD57 citations95
US6473867B2Oct 29, 2002
Parity storage unit, in a disk array system, for generating updated parity data from received data records
HITACHI LTD28 citations92
US5694576ADec 2, 1997
Cache control by adding record identification information to partial write request
HITACHI LTD21 citations92
US5497472AMar 5, 1996
Cache control method and apparatus for storing data in a cache memory and for indicating completion of a write request irrespective of whether a record to be accessed exists in an external storage unit
HITACHI LTD26 citations92
US5410666AApr 25, 1995
On-line dumping system and disk sub system
HITACHI LTD20 citations92
US4807180AFeb 21, 1989
Multiple control system for disk storage and method for realizing same
HITACHI LTD43 citations92
US4803572AFeb 7, 1989
Recording/reproducing method and apparatus of magnetic disk unit in which playback commences before the magnetic head is completely centered on the track
HITACHI LTD24 citations91
US4870565ASep 26, 1989
Parallel transfer type director means
HITACHI LTD24 citations89
US6032263AFeb 29, 2000
Parity storage unit, in a disk array system, for generating updated parity data from received data records
HITACHI LTD12 citations82
US6085286AJul 4, 2000
Cache control method and apparatus
HITACHI LTD6 citations74
US6463505B2Oct 8, 2002
Disk array device with selectable method for generating redundant data
HITACHI LTD11 citations73
US6209107B1Mar 27, 2001
Parity storage unit, in a disk array system, for generating updated parity data from received data records
HITACHI LTD9 citations73
US5826002AOct 20, 1998
Parity storage unit, in a disk array system for generating updated parity data from received data records
HITACHI LTD9 citations73
US5606684AFeb 25, 1997
On-line dumping system and disk sub-system
HITACHI LTD14 citations73
US4819203AApr 4, 1989
Control system for interruption long data transfers between a disk unit or disk coche and main memory to execute input/output instructions
HITACHI LTD19 citations73
US5179684AJan 12, 1993
Method of changing the track and recording data
HITACHI LTD9 citations71
US4814904AMar 21, 1989
Method of controlling erasing following format writing in a magnetic disc apparatus
HITACHI LTD11 citations69
US4805048AFeb 14, 1989
Method for controlling to keep off defects on magnetic disks
HITACHI LTD6 citations63
US6961816B2Nov 1, 2005
Disk array device with selectable method for generating redundant data
HITACHI LTD1 citations62
US6604172B2Aug 5, 2003
Disk array device with selectable method for generating redundant data
HITACHI LTD2 citations62
US5187778AFeb 16, 1993
Buffered disk unit and method of transferring data therein
HITACHI LTD5 citations62
US5325506AJun 28, 1994
Method of changing the track and recording data
HITACHI LTD4 citations60
US7082496B2Jul 25, 2006
Cache control method and apparatus
HITACHI LTD0 citations52
US5315451AMay 24, 1994
Rotating storage track format emulation
HITACHI LTD0 citations51