I have setup a little (280G) xfs on RAID 10 (RAID 1 on RAID 0). This
has 8 SCSI drives (4 per card).
Everything seems to work fine, expect the RAID resync craaaawwwllllsss.
It goes at the minimum of 100k/s which should take a few months to
finish syncing :) It sometimes bumps up to 250 k/s, but never higher
even with no system activity.
First off, does anyone know of a way to bump the sync rate up? Could
this be some sorta weirdness between XFS and MD that is causing the slow
resync? On a simple RAID 1 setup (2 disks) w/ XFS on the device, the
resync is as speedy as the SCSI card allows when there is no other I/O
which is what I would expect from MD.
Other info, I am using 64k chunk sizes on both the RAID 1 and RAID 0
with 4k block sizes on XFS (obiviously because it on i386). These are
10000 rpm ultra SCSI 3 drives, so they should scream. I was able to dd
a blank 200G file relatively fast using bs=64k on this device, so it
seems to be ok with creating/copying files.
Thanks for any help,
-tduffy
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