Patent ID: 9032151
Filing Date: 2015-05-12
Classification: G06F,Y02D

Abstract:
1. A method for operating a computer that is coupled to a storage medium and a cache device, the computer comprising an operating system, the method comprising acts of: (A) activating a write recorder component configured for identifying write operations performed to the storage medium which are not performed to the cache device; (B) in response to a request to write a data item to the storage medium at an address, causing the data item to be written to the storage medium at the address and to the cache device at a corresponding address; (C) capturing a snapshot of the data item written to the cache device at the corresponding address; (D) subsequent to a reboot of the operating system, determining whether the data item written to the cache device at the corresponding address can reliably be used to satisfy a request to read the data item from the storage medium at the address, the determining including determining, via the write recorder component, whether the data item written to the storage medium at the address was modified after completion of act (B); and (E) if it is determined in act (D) that the data item written to the cache device at the corresponding address cannot reliably be used to satisfy the request to read the data item from the storage medium at the address, then causing the cache device to be updated using the snapshot and data from the write recorder component.