Thomas Backlund skrev:
Thomas Backlund skrev:
Peter Rabbitson skrev:
Hi,
Some weeks ago I upgraded from 2.6.23 to 2.6.27.4. After a failed hard
drive I realized that re-adding drives to a degraded raid10 no longer
works (it adds the drive as a spare and never starts a resync). Booting
back into the old .23 kernel allowed me to complete and resync the array
as usual. Attached find a test case reliably failing on vanilla 2.6.27.4
with no patches.
I've just been hit with the same problem...
I have a brand new server setup with 2.6.27.4 x86_64 kernel and a mix of
raid0, raid1, raid5 & raid10 partitions like this:
And an extra datapoint.
Booting into 2.6.26.5 triggers an instant resync of the spare disks, so
it means we have a regression between 2.6.26.5 and 2.6.27.4
If no-one have a good suggestion to try, I'll start bisecting tomorrow...
Ok,
so it was a pita to bisect as the testkernels oopsed from time to time
triggering a full rebuild of my 2.5 TiB raid5 wich takes ~4-5 hours to
complete... and since I wanted to wait for all raids to be fully up and
synced between reboots, I hat to wait a lot...
But anyway...
This is the commit that breaks the raid10 rebuild/resync:
--- cut ---
6c2fce2ef6b4821c21b5c42c7207cb9cf8c87eda is first bad commit
commit 6c2fce2ef6b4821c21b5c42c7207cb9cf8c87eda
Author: Neil Brown <neilb@xxxxxxxxxxxxxx>
Date: Sat Jun 28 08:31:31 2008 +1000
Support adding a spare to a live md array with external metadata.
i.e. extend the 'md/dev-XXX/slot' attribute so that you can
tell a device to fill an vacant slot in an and md array.
Signed-off-by: Neil Brown <neilb@xxxxxxx>
--- cut ---
I have verified that adding this patch to a working 2.6.26 kernel breaks
the rebuild/resync
I have not verified if reverting it on a 2.6.27 kernel restores the
rebuild/resync as it does not revert cleanly...
So...
Any suggestions of what to try next ?
--
Thomas
--
To unsubscribe from this list: send the line "unsubscribe linux-raid" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
