Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Patent
1997-03-26
2000-11-28
Moise, Emmanuel L.
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
711114, G06F 1100
Patent
active
061548537
ABSTRACT:
A method of dynamically changing a storage system from a RAID configuration to a mirror configuration is provided. The change occurs when a device begins to fail or fails completely. Data from the logical volumes of the failed device is written to corresponding parity volumes within the RAID group. In addition, data from all logical data volumes is copied to spare devices. Once all the data is copied, the system operates in a mirrored mode. A mirrored mode includes writing data to both and active and backup volume for each write transaction. When the failed device is replaced the data and parity volumes are restored. Once restored, the spare devices are returned to inactive status.
REFERENCES:
patent: 4899342 (1990-02-01), Potter et al.
patent: 5166936 (1992-11-01), Ewert et al.
patent: 5202979 (1993-04-01), Hillis et al.
patent: 5313626 (1994-05-01), Jones et al.
patent: 5390187 (1995-02-01), Stallmo
patent: 5504882 (1996-04-01), Chai
patent: 5526482 (1996-06-01), Stallmo et al.
patent: 5542065 (1996-07-01), Burkes et al.
patent: 5579475 (1996-11-01), Blaum et al.
patent: 5611069 (1997-03-01), Matoba et al.
P. Chen, E. Lee, G. Gibson, R. Katz and D. Patterson, RAID High-Performance, Reliable Secondary Storage, Jun. 1994.
D. Patterson, P. Chen, G. Gibson and R. Katz, Introduction to Redundant Arrays of Inexpensive Disks (RAID), 1989.
P. McLean, An Introduction to RAID, Redundant Arrays of Inexpensive Disks, Apr. 24, 1991.
EMC Intros Products & Features for Mainframs RAID, Newbytes, Apr. 18, 1995.
EMC Introduces New Raid Level for Symmetrix Family RAID-S: The Highest Performance Parity-Based RAID, Press Release, Apr. 17, 1995.
Clark, Esq. William R.
EMC Corporation
Gunther, Esq. John M.
Moise Emmanuel L.
LandOfFree
Method and apparatus for dynamic sparing in a RAID storage syste does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for dynamic sparing in a RAID storage syste, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for dynamic sparing in a RAID storage syste will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1736101