1997-06-18
1999-06-29
DeCady, Albert
Excavating
371 511, G11C 2900
Patent
active
059179996
ABSTRACT:
When receiving a write request from a processor, a control unit checks the condition of existence (or the presence/absence) in a cache for information necessary for generation of an updated value of a parity record, receives write data and reports the completion of the write request to the processor. In asynchronism with the write request from the processor, the control unit performs a load process for that information among the information necessary for generation of the updated value of the parity record which may be prepared in asynchronism with the write request from the processor and a write after process for the updated value of the parity record.
REFERENCES:
patent: 4761785 (1988-08-01), Clark et al.
patent: 4814980 (1989-03-01), Peterson et al.
patent: 4942579 (1990-07-01), Goodlander et al.
patent: 5208813 (1993-05-01), Stallmo
patent: 5235601 (1993-08-01), Stallmo et al.
patent: 5239659 (1993-08-01), Rudeseal et al.
patent: 5490248 (1996-02-01), Dan et al.
patent: 5497457 (1996-03-01), Ford
Patterson, David A. et al, "A Case for Redundant Arrays of Inexpensive Disks (RAID)," ACM SIGMOD Conference Proceedings, Chicago, Illinois, Jun. 1-3.
Arai Kouji
Kamo Yoshihisa
Kitajima Hiroyuki
Yamamoto Akira
De'cady Albert
Hitachi , Ltd.
LandOfFree
Storage unit subsystem does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Storage unit subsystem, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Storage unit subsystem will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1384360