Optimized read performance method using metadata to protect...

Details Optimized read performance method using metadata to protect... Optimized read performance method using metadata to protect...

2006-10-31

2006-10-31

Lamarre, Guy J. (Department: 2133)

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital data error correction

C360S053000

Reexamination Certificate

active

07131050

ABSTRACT:
The present invention is an apparatus and method for protecting against drive anomaly errors while optimizing random read performance. Data block persistency is explicitly verified when a data block is written. Data block integrity and location checks are performed by reading data from a single drive. Through such a process, reading of metadata from a second drive is not required, thus decreasing the drive I/O workload. In an example of the invention, a combination of a CRC and a location tag interleaved as metadata along with user data on a single drive may be employed to perform a read operation in accordance with the present invention.

REFERENCES:
patent: 5265104 (1993-11-01), Weng
patent: 5274645 (1993-12-01), Idleman et al.
patent: 5333143 (1994-07-01), Blaum et al.
patent: 5398253 (1995-03-01), Gordon
patent: 6769088 (2004-07-01), Weng

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