Inventor
NAGASAWA TERUO
JP14 patents
Patents
14 patentsUS6240494B1May 29, 2001
Subsystem replacement method
HITACHI LTD132 citations98
US6684306B1Jan 27, 2004
Data backup in presence of pending hazard
HITACHI LTD80 citations97
US6647476B2Nov 11, 2003
Subsystem replacement method
HITACHI LTD74 citations96
US6950917B2Sep 27, 2005
Subsystem replacement method
HITACHI LTD21 citations92
US6845435B2Jan 18, 2005
Data backup in presence of pending hazard
HITACHI LTD21 citations92
US6665781B2Dec 16, 2003
Method and apparatus for data duplexing in storage unit system
HITACHI LTD23 citations92
US5475859ADec 12, 1995
Disk cache unit having reduced waiting times for data transfer
HITACHI LTD29 citations92
US5369751ANov 29, 1994
Disk cache control unit
HITACHI LTD19 citations82
US6584473B2Jun 24, 2003
Information storage system
HITACHI LTD9 citations73
US7114049B2Sep 26, 2006
Adaptive remote copy in a heterogeneous environment
HITACHI LTD3 citations63
US7213114B2May 1, 2007
Remote copy for a storage controller in a heterogeneous environment
HITACHI LTD3 citations62
US6988176B2Jan 17, 2006
Method and apparatus for data duplexing in storage unit system
HITACHI LTD3 citations62
US7200729B2Apr 3, 2007
Subsystem replacement method
HITACHI LTD0 citations52
US7069403B2Jun 27, 2006
Method and apparatus for data duplexing in storage unit system
HITACHI LTD0 citations51