Rebuild Strategies for Redundant Disk Arrays.
Gang Fu, Alexander Thomasian, Chunqi Han, Spencer W. Ng · 2004
RAID5 performance is critical while rebuild is in progress, since in addition to the increased load to recreate lost data on demand, there is interference caused by rebuild requests. We report on simulation results, which show that processing user requests at a higher, rather than the same priority as rebuild requests, results in a lower response time for user requests, as well as reduced rebuild time. Several other parameters related to rebuild processing are also explored. 1