John A Teske

US Patent:

20050278476, Dec 15, 2005

Filed:

Jun 10, 2004

Appl. No.:

10/865339

Inventors:

John Teske - Oronoco MN, US
Jeffrey Williams - Rochester MN, US

International Classification:

G06F012/00

US Classification:

711100000

Abstract:

A method, apparatus and program storage device for keeping track of writes in progress on multiple controllers during resynchronization of RAID stripes on failover is disclosed. Quicker and more efficient RAID 5 resynchronization is provided by mirroring writes that are in progress to alternate controller. When the controller handling the writes fails, the writes in progress are the only blocks that need to be resynchronized. Thus, consistent parity may be generated without resynchronizing the entire RAID.