Device array system providing redundancy of disks from active sy

Details Device array system providing redundancy of disks from active sy Device array system providing redundancy of disks from active sy

1997-11-26

2000-06-20

Beausoliel, Jr., Robert W.

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

H03K 19003

Patent

active

060790296

ABSTRACT:
In a device array system, a failure alternate device is fetched from another logic group of a higher redundancy without needing a hot spare patrol, accordingly recovering redundancy of data. In a case corresponding to a mirrored device of RAID-1, as a logic group of a device array unit, a construction control unit constructs a first logic group in which the same data is stored into (N=2) devices and duplicated and a second logic group in which the same data is stored into (N+1=3) devices and triplicated. when one device has failed in the first logic group having a lower redundancy and the redundancy is lost, a failure processing unit fetches one device from the second logic group of a higher redundancy into the first logic group and reconstructs data by using the fetched device as a failure alternate device, accordingly recovering the redundancy of the first logic group.

REFERENCES:
patent: 4914656 (1990-04-01), Dunphy, Jr. et al.
patent: 4989205 (1991-01-01), Dunphy, Jr. et al.
patent: 4989206 (1991-01-01), Dunphy, Jr. et al.
patent: 5077736 (1991-12-01), Dunphy, Jr. et al.
patent: 5479653 (1995-12-01), Jones
The RAIDBook, A Source Book for RAID Technology, Edition 1-1, The Raid Advisory Board, St. Peter, MN, Nov. 18, 1993.

Affiliated with

Also associated with

Rating

Device array system providing redundancy of disks from active sy does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Device array system providing redundancy of disks from active sy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device array system providing redundancy of disks from active sy will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1864220