Buffer for RAID controller with disabled post write cache

摘要

Enhancing management of controllers in a RAID system when a post-write-cache of a is disabled, by supplying a stripe buffer that stores sequential write requests—and before such requests are actually written in to the physical disc drives. The stripe buffer can temporarily store data, until the data level reaches the stripe buffer size. Thereafter, contents of the stripe buffer can be flushed onto disc.

主权项

1. A redundant array of inexpensive disks (RAID) storage system comprising:
a RAID controller that is communicatively coupled to a disk array for a control of read and write operations, the RAID controller comprising:
a write cache to store write requests; anda stripe buffer to store write requests of a host when the write cache is disabled for the RAID controller, wherein the RAID controller is to write the write requests stored in the stripe buffer to the disk array in response to reaching a full storage capacity of the stripe buffer.