Messages in this thread | | | From | (Måns Rullgård) | Subject | Re: RAID1 resync speed in 2.6.0 | Date | Tue, 06 Jan 2004 12:03:07 +0100 |
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mru@kth.se (Måns Rullgård) writes:
> I just set up a largish (~100 GB) RAID1 array under Linux 2.6.0. Now, > /proc/mdstat is happily telling me that the resync will be completed > in 3700 minutes. This seems terribly slow to me. At first, it > wouldn't work at all, complaining about "bio too big", so I changed > RESYNC_BLOCK_SIZE to 32k.
I found it. It's a raid1 on top of raid0. Apparently the raid1 resync considered the I/O from the raid0 devices to the physical disks as normal I/O and reduced the speed. I increased the min rate in /proc/... and now it's resyncing at 40 MB/s. Much better.
-- Måns Rullgård mru@kth.se
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