Method of handling disk sector errors in dasd cache

Details Method of handling disk sector errors in dasd cache Method of handling disk sector errors in dasd cache

G - Physics

11

B

354/224

G11B 20/18 (2006.01) G06F 12/08 (2006.01)

Patent

CA 1288870

METHOD OF HANDLING DISK SECTOR ERRORS IN DASD CACHE Abstract of the Disclosure In a DASD caching system, in which pages of sectors of data are stored by reading in a desired sector and prefetching a plurality of adjacent sectors for later access, errors in disk storage media cause error signals to be generated. Such errors are handled by storing indications of which sectors have errors and which do not, and accessing such indications in response to later requests for such sectors. Such indications are stored in each page in the cache. Further, a history is maintained of which pages and sectors therein, were placed in the cache in the past.

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