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SubjectRe: limits on raid
david@lang.hm wrote:
> in my case it takes 2+ days to resync the array before I can do any
> performance testing with it. for some reason it's only doing the rebuild
> at ~5M/sec (even though I've increased the min and max rebuild speeds
> and a dd to the array seems to be ~44M/sec, even during the rebuild)

With performance like that, it sounds like you're saturating a bus
somewhere along the line. If you're using scsi, for instance, it's very
easy for a long chain of drives to overwhelm a channel. You might also
want to consider some other RAID layouts like 1+0 or 5+0 depending upon
your space vs. reliability needs.

--
Brendan Conoboy / Red Hat, Inc. / blc@redhat.com
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