Array type disk system updating redundant data asynchronously wi

Error detection/correction and fault detection/recovery – Data processing system error or fault handling – Reliability and availability

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G06F 1100

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active

059580674

ABSTRACT:
In a disk array system, data read out and data written anew are temporarily held as former data in a former data holding portion. When a write operation has occurred, a CPU searches the holding portion for write data, it generates update data from the new and former write data items, and it holds the generated update data in an update data holding portion. In addition, the CPU stores the storage address of redundant data associated with the held update data, as log data in a log data holding portion. Further, the CPU operates asynchronously with the write operation to read out the redundant data of the address of the holding portion, to calculate new redundant data from the read redundant data and the held update data, and to write the new redundant data into the address of the log data. On this occasion, a parity area and a data area are separated so as to heighten read/write processing speeds and a parity generation processing speed.

REFERENCES:
patent: 5206943 (1993-04-01), Callison et al.
patent: 5375128 (1994-12-01), Menon et al.
patent: 5418921 (1995-05-01), Cortney et al.
patent: 5506979 (1996-04-01), Menon
patent: 5526482 (1996-06-01), Stallmo et al.
patent: 5530948 (1996-06-01), Islam
patent: 5617530 (1997-04-01), Stallmo et al.
patent: 5708668 (1998-01-01), Styczinski
"Performance Consequences of Parity Placement in Disk Arrays", E.K. Lee and R.H. Katz; pp.190-199, 9-1991, ACM.
"A Case for Redundant Arrays of Inexpensive Disks (RAID)", D.A. Patterson, G. Gibson, and R.H. Katz; (24 pp.), 12-1987, Report No. UCB/CSD 87/301, Univ of CA/Berkeley.
"Feature Articles: Disk Array Systems", Nikkei Electronics, No. 579, Apr. 26, 1993, pp. 77-103). (Not in English, But Considered Only Insofar As To Applicants Statement of Relevamce) SE.

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