From: "Justin Piszcz" <jpiszcz@lucidpixels.com>
To: linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org
Subject: 3.10.1: echo repair > sync_action causes hang on RAID-1 (2 x SSD)
Date: Sun, 21 Jul 2013 06:26:55 -0400 [thread overview]
Message-ID: <000501ce85fc$d3a60a10$7af21e30$@lucidpixels.com> (raw)
Hi,
When I run repair on an MD-RAID1 sync_action, the speed slows down and it
stays like this (below) for hours.
The system is then completely unresponsive to user input. I have replaced a
failing SSD; however, after a check, mismatch_cnt seems to increase over
time. When I run repair, the system freezes to user-input. Has anyone else
run into this issue with a RAID-1 volume (2 x SSD) using 0.90 metadata?
Long ago I used to use this same configuration with two physical disks and
there was never a problem.
Even though I left a root shell open, this has no effect to break the
resync:
# echo idle > /sys/devices/virtual/block/md1/md/sync_action
Every 1.0s: cat /proc/mdstat Sun Jul 21 06:15:38
2013
Personalities : [raid1]
md1 : active raid1 sdc2[0] sdb2[1]
233381376 blocks [2/2] [UU]
[>....................] resync = 0.0% (151616/233381376)
finish=36171.5min speed=107K/sec
md0 : active raid1 sdc1[0] sdb1[1]
1048512 blocks [2/2] [UU]
unused devices: <none>
10 minutes later:
233381376 blocks [2/2] [UU]
[>....................] resync = 0.0% (151616/233381376)
finish=52219.3min speed=74K/sec
Where it hangs (151616) or elsewhere, has been different each time I watched
it, it does not appear to be hanging at the same block each time.
Justin.
next reply other threads:[~2013-07-21 10:26 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-21 10:26 Justin Piszcz [this message]
2013-07-21 23:02 ` 3.10.1: echo repair > sync_action causes hang on RAID-1 (2 x SSD) NeilBrown
2013-07-25 23:10 ` Justin Piszcz
2013-07-26 0:35 ` NeilBrown
2013-07-26 9:56 ` Justin Piszcz
2013-07-29 5:56 ` NeilBrown
2013-07-29 7:33 ` Justin Piszcz
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