* RAID10 Resync fails with specific chunk size and drive sizes (reproducible)
@ 2007-02-20 11:35 Peter Rabbitson
2007-02-20 13:44 ` Peter Rabbitson
0 siblings, 1 reply; 2+ messages in thread
From: Peter Rabbitson @ 2007-02-20 11:35 UTC (permalink / raw)
To: linux-raid
Hi,
I think I've hit a reproducible bug in the raid 10 driver, tried on two
different machines with kernels 2.6.20 and 2.6.18. This is a script to
simulate the problem:
======================
#!/bin/bash
modprobe loop
for ID in 1 2 3 ; do
echo -n "Creating loopback device $ID... "
dd if=/dev/zero of=dsk${ID}.img bs=512 count=995967
losetup /dev/loop${ID} dsk${ID}.img
echo "done."
done
mdadm -C /dev/md2 -l 10 -n 3 -p o2 -c 2048 /dev/loop1 /dev/loop2 /dev/loop3
echo "Raid device assembled, check /proc/mdstat's output when resync is finished"
======================
This is the output I get in /proc/mdstat after the resync settles:
======================
md2 : active raid10 loop3[2] loop2[3](F) loop1[0]
746496 blocks 2048K chunks 2 offset-copies [3/2] [U_U]
======================
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: RAID10 Resync fails with specific chunk size and drive sizes (reproducible)
2007-02-20 11:35 RAID10 Resync fails with specific chunk size and drive sizes (reproducible) Peter Rabbitson
@ 2007-02-20 13:44 ` Peter Rabbitson
0 siblings, 0 replies; 2+ messages in thread
From: Peter Rabbitson @ 2007-02-20 13:44 UTC (permalink / raw)
To: linux-raid
After I sent the message I received the 6 patches from Neil Brown. I
applied the first one (Fix Raid10 recovery problem) and it seems to be
taking care of the issue I am describing. Probably due to the rounding
fixes.
Thanks
^ permalink raw reply [flat|nested] 2+ messages in thread
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2007-02-20 11:35 RAID10 Resync fails with specific chunk size and drive sizes (reproducible) Peter Rabbitson
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