Patent ID: 7627713
Filing Date: 2009-12-01
Classification: G06F

Abstract:
1. A method comprising: receiving a cache inaccessibility notification signifying future inaccessibility of a disk cache during a time in which a hard disk will still be accessible; flushing the disk cache to the hard disk; receiving a write request from an operating system during the time in which the disk cache is inaccessible and the hard disk is accessible; performing a write operation to the hard disk, creating stale data in the disk cache; maintaining a log of the write operation to keep track of the stale data; and invalidating the stale data in the disk cache when the disk cache becomes accessible; wherein determining cache inaccessibility comprises receiving a cache inaccessibility notification signifying a change in system state, and wherein the cache inaccessibility notification signifies that a system is entering hibernation.