Logging disk recovery operations in a non-volatile solid-state memory cache

摘要

An apparatus includes a controller capable of being coupled to a magnetic data storage media and a cache. The cache includes non-volatile, solid-state memory. The controller is configured to detect a defect in the data storage media requiring a recovery operation and allocate a portion of the cache for storage of a journal to be used in the recovery operation. The controller is further configured to log steps of the recovery operation to the journal.

主权项

1. An apparatus comprising:
a controller capable of being coupled to a magnetic data storage media and a non-volatile, solid-state, cache, the controller configured to:
in response to reading data previously stored on the magnetic data storage media, detect a defect in the data requiring a recovery operation;allocate a portion of the cache for storage of a journal to be used in the recovery operation; andlog steps of the recovery operation to the journal.