Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability
Patent
1997-09-04
2000-05-23
Le, Dieu-Minh T.
Error detection/correction and fault detection/recovery
Data processing system error or fault handling
Reliability and availability
714 8, 711114, 711155, G06F 1100
Patent
active
060676353
ABSTRACT:
The invention relates to a method and apparatus for maintaining data/parity consistency in a RAID data storage system. The invention utilizes reserved disk storage space in the RAID array to log data necessary to restore data/parity consistency should an interruption event, such as a power failure, corrupt the data stored in a particular redundancy group. In one embodiment, the invention logs new data and new parity information to the reserved disk storage space before the new data and new parity information are written to the appropriate locations in the associated redundancy group. In this way, if an interruption event occurs when either the new data or the new parity information has already been written to the redundancy group but the other has not, the corresponding data and parity information stored in the reserved disk storage space can be used to restore data/parity consistency after the event has ended.
REFERENCES:
patent: 5195100 (1993-03-01), Katz et al.
patent: 5297258 (1994-03-01), Hale et al.
patent: 5375128 (1994-12-01), Menon et al.
patent: 5379417 (1995-01-01), Lui et al.
patent: 5390327 (1995-02-01), Lubbers et al.
patent: 5408644 (1995-04-01), Schneider et al.
patent: 5418921 (1995-05-01), Cortney et al.
patent: 5418925 (1995-05-01), DeMoss et al.
patent: 5432922 (1995-07-01), Polyzois et al.
patent: 5463765 (1995-10-01), Kakuta et al.
patent: 5479653 (1995-12-01), Jones
patent: 5490248 (1996-02-01), Dan et al.
patent: 5497457 (1996-03-01), Ford
patent: 5533190 (1996-07-01), Binford et al.
patent: 5548711 (1996-08-01), Brant et al.
patent: 5557770 (1996-09-01), Bhide et al.
Chen et al., "RAID: High Performance, Reliable Secondary Storage", ACM Computing Surveys, vol. 26, No. 2, pp. 145-185, Jun. 1994.
DeKoning Rodney A.
Humlicek Donald R.
Johnson Max L.
Rink Curtis W.
Le Dieu-Minh T.
LSI Logic Corporation
LandOfFree
Preservation of data integrity in a raid storage device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Preservation of data integrity in a raid storage device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Preservation of data integrity in a raid storage device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1844871