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I've been experiencing spontaneous checksum failure/corruption on
read at the zvol level recently on a box running r12 as well. None
of the disks show any errors. All of the errors show up at the zvol
level until all the disks in the vol get marked as degraded and then
a reboot clears it up. repeated scrubs find files to delete, but
then after additional heavy read I/O activity, more checksum on read
errors occur, and more files need to be removed. So far on r14 I
haven't seen this, but I'm keeping an eye on it.<br>
<br>
The write activity on this server is very low. I'm currently trying
to evacuate it with zfs send | mbuffer to another host over 10g, so
the read activity is very high and consistent over a long period of
time since I have to move about 10TB.<br>
<br>
<br>
<div class="moz-cite-prefix">On 8/21/2015 2:06 AM, wuffers wrote:<br>
</div>
<blockquote
cite="mid:CA+tR_Kyic7J3HL00SV3e_NvbC3viMr8soWQ5QTrth9JJeGiA-g@mail.gmail.com"
type="cite">
<div dir="ltr">Oh, the PSOD is not caused by the corruption in ZFS
- I suspect it was the other way around (VMware host PSOD ->
ZFS corruption). I've experienced the PSOD before, it may be
related to IO issues which I outlined in another post here:
<div><a moz-do-not-send="true"
href="http://lists.omniti.com/pipermail/omnios-discuss/2015-June/005222.html">http://lists.omniti.com/pipermail/omnios-discuss/2015-June/005222.html</a></div>
<div><br>
</div>
<div>Nobody chimed in, but it's an ongoing issue. I need to
dedicate more time to troubleshoot but other projects are
taking my attention right now (coupled with a personal house
move time is at a premium!).<br>
<div><br>
</div>
<div>Also, I've had many improper shutdowns of the hosts and
VMs, and this was the first time I've seen a ZFS
corruption. </div>
<div><br>
</div>
<div>I know I'm repeating myself, but my question is still:</div>
<div>- Can I safely use this block device again now that it
reports no errors? Again, I've moved all data off of it..
and there are no other signs of hardware issues. Recreate
it? <br>
<div class="gmail_extra"><br>
<div class="gmail_quote">On Wed, Aug 19, 2015 at 12:49 PM,
Stephan Budach <span dir="ltr"><<a
moz-do-not-send="true"
href="mailto:stephan.budach@jvm.de" target="_blank"><a class="moz-txt-link-abbreviated" href="mailto:stephan.budach@jvm.de">stephan.budach@jvm.de</a></a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0
.8ex;border-left:1px #ccc solid;padding-left:1ex">Hi
Joerg,<br>
<br>
Am 19.08.15 um 14:59 schrieb Joerg Goltermann:
<div>
<div><br>
<blockquote class="gmail_quote" style="margin:0 0
0 .8ex;border-left:1px #ccc
solid;padding-left:1ex">
Hi,<br>
<br>
the PSOD you got can cause the problems on your
exchange database.<br>
<br>
Can you check the ESXi logs for the root cause
of the PSOD?<br>
<br>
I never got a PSOD on such a "corruption". I
still think this is<br>
a "cosmetic" bug, but this should be verified by
one of the ZFS<br>
developers ...<br>
<br>
- Joerg</blockquote>
</div>
</div>
</blockquote>
</div>
</div>
</div>
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</div>
<br>
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