arcmsr - device going offline under 3.10.x (regression?)

[Nikola Ciprich <nikola.ciprich@linuxbox.cz>]

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Hi,

we're experiencing strange trouble with new box using areca based
RAID and 3.10.x kernel.

When I load disk subsystem (ie with fio benchmark), system seems to be
working fine, but after some time (usually next day), device seems to die:


<3>[43567.763088] EXT4-fs (dm-4): previous I/O error to superblock detected
<3>[43567.763091] sd 0:0:1:0: rejecting I/O to offline device
<2>[43567.763093] EXT4-fs error (device dm-4): __ext4_get_inode_loc:4039: inode #135868: block 524619: comm syslog-ng: unable to read itable block
<2>[43567.763094] EXT4-fs error (device dm-4) in ext4_reserve_inode_write:4962: IO failure
<3>[43567.763095] EXT4-fs (dm-4): previous I/O error to superblock detected
<3>[43567.763097] sd 0:0:1:0: rejecting I/O to offline device
<4>[43567.763099] EXT4-fs warning (device dm-4): ext4_evict_inode:258: couldn't mark inode dirty (err -5)
<3>[43567.763143] sd 0:0:1:0: rejecting I/O to offline device
<3>[43567.763150] sd 0:0:1:0: rejecting I/O to offline device


Hardware is Supermicro X9DRW/X9DRW with 6 core E5-2620, 64GB RAM, running centos6 + vanilla
3.10.x kernel. I tried with two different adapters (1223 and 1882). Since box uses redundant
powersupplies, I don't think it could be power issue as I found in some areca FAQ. I'm using
westerdn digital raid edition SATA drives.

we've experienced this problem with 3.10.22 and 3.10.25. I wasn't able to reproduce this
with 3.0.101 (yet, I'm torturing the box for ~2 days now, so I can't be sure).

Since the problem takes quite long to reproduce (and I'm not sure after how long I can tell
the system works fine), I'd like to ask about your oppinions before trying to bisect this..

any ideas?

thanks a lot in advance!

BR

nik
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Ing. Nikola CIPRICH
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