Invalidation of storage control unit cache metadata

Details Invalidation of storage control unit cache metadata Invalidation of storage control unit cache metadata

2008-03-04

2008-03-04

McCarthy, Christopher (Department: 2113)

Error detection/correction and fault detection/recovery

Data processing system error or fault handling

Reliability and availability

C714S048000, C714S005110, C714S006130, C707S793000

Reexamination Certificate

active

10837302

ABSTRACT:
Method, apparatus and program product are provided for the invalidation of faulty metadata in a storage controller coupled to a host device. Faulty metadata may include metadata which no longer matches the associated customer data tracks stored on a DASD or other storage device. When faulty metadata is detected, metadata tracks are selected to be invalidated. A command is received through a host interface, without the controller being taken off-line from the host, and the specified metadata tracks are invalidated. Subsequently, the invalidated metadata tracks are rebuilt. The disclosed method, apparatus and program product invalidate the faulty metadata with reduced impact on normal host/controller I/O operations.

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