2014-08-10 17:12:20 UTC
usually separated by a few weeks (sometimes a few in the same day). I've
encountered it in the following situations:
* Running a zfs send/recv on the same machine to backup one FS to another
* Ripping a BD disk to ZFS
* Running an MKV merge to remux a large (~30GB) file (both source and
destination on the same FS).
* Running a zfs diff between two snapshots
Among the above, all but the zfs diff only sometimes cause a problem. The
zfs diff will always lock up the machine. Oddly enough I've run a scrub at
least 3 times and has always run without issue. I do not know if the zfs
diff lockup is related to my other lockups.
My setup consists of an Intel DQ670W motherboard with 12G of RAM and a 4
port SATA card connecting 6 WD 2TB Black drives in raidz2 and 1 Intel 520
60G SSD (boot drive). My FS was created under FreeBSD and has a "shares
ZAP object" prompting this change:
https://github.com/zfsonlinux/zfs/pull/1927. The case is very well cooled
for the motherboard, processor, and drives so I doubt if that is an issue.
In all of this, I have only been able to capture two reports of anything
going wrong. Usually the system is completely locked up and there is
nothing I can except hit the reset button. I do have the crashkernel
options set, but it seems to have failed to capture anything.
The crash log that appeared in /var/crash at one point has since
disappeared so I no longer have it. The below dmesg output was from a zfs
diff. Every single time I run a ZFS diff, I get a hard-lock, though only
once was I able to get the output of dmesg nor anything on the console. In
that case, the console did not contain anything not in the dmesg output.
Also, below, sdd is the boot drive.
I am asking if anyone has any ideas as to how I could diagnose this
problem. At this point I do not know if the problem is with the pool/FS or
if it is hardware. I am worried that this is an issue with the pool and I
will have to recreate it.
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