REDUCING STRESS ON RAIDS UNDER REBUILD

摘要

A method for reducing stress on a RAID under rebuild is disclosed herein. In one embodiment, such a method includes performing the following actions while the RAID is undergoing a rebuild process: (1) redirect writes intended for the RAID to a temporary storage area located on a same primary storage system as the RAID, and (2) redirect reads intended for the RAID to a secondary storage system configured to store a copy of data in the RAID. The method is further configured to perform the following actions upon completing the rebuild process: (3) update the rebuilt RAID to reflect writes made to the temporary storage area during the rebuild process, and (2) redirect reads and writes to the rebuilt RAID. A corresponding system and computer program product are also disclosed.

主权项

1. A method for reducing stress on a RAID under rebuild, the method comprising:
while a RAID is undergoing a rebuild process, (1) redirecting writes intended for the RAID to a temporary storage area located on a same primary storage system as the RAID, and (2) redirecting reads intended for the RAID to a secondary storage system configured to store a copy of data in the RAID; and upon completing the rebuild process, (3) updating the rebuilt RAID to reflect writes made to the temporary storage area during the rebuild process, and (4) redirecting reads and writes to the rebuilt RAID.