Write-back disk cache management
OwnerEdward K. Lee, Boon-Lock Yeoinventors
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Abstract
A method for efficiently utilizing write-back caches in disk drives to build inexpensive, high-performance, reliable disk arrays. In particular, we describe a method for preserving the ordering of writes issued to a disk array consisting of disks that support write-back caching, without requiring the frequent flushing of the write-back cache.
Claims16
A method of storing data that preserves an order of writes on a disk storage subsystem with write-back cache turned on comprising:
- receiving a request to write data;
- writing the data to a disk;
- and
- periodically executing disk-cache flush command.
A machine readable-medium having stored thereon a set of instruction, which when executed, perform a method of storing data that preserves an order of writes on a disk storage subsystem with write-back cache turned on, the method comprising:
- receiving a request to write data;
- writing the data to a disk;
- and
- periodically executing disk-cache flush command.
Dependencies are inferred from the claim text.