VA7410 performance when rebuilding

Carl Houseman — Sat, 05 Jan 2008 18:20:49 GMT

Have a VA7410 that recently lost a (73GB 15K)drive during business hours. It is set for all the defaults except RAID level is RAID1+0. And there is unallocated space equal to a single drive on each RG, so effectively two hot spares per RG.

While the array was rebuilding (rebuild priority: Low), performance of the RG with the failed drive was abysmal - maybe 10% of normal. Once the rebuild finished, performance returned to normal.

I've been told before that these arrays disable write caching when a battery is bad, accounting for terrible performance, but why would there be a similar loss of performance while rebuilding? There's no need for caching to be disabled.

I'm guessing I either need to config back to AutoRaid or set the rebuild priority to High, which couldn't possibly make performance worse. Can anyone say for sure the best solution?

thanks,
Carl

topic VA7410 performance when rebuilding in Disk Enclosures

VA7410 performance when rebuilding