From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stefan Priebe <s.priebe@profihost.ag>
Subject: Re: RBD trim / unmap support?
Date: Fri, 02 Nov 2012 21:13:23 +0100
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>> [   75.480358] end_request: I/O error, dev sdc, sector 50331642
>> [   75.496374] sd 2:0:0:4: [sdc]
>> [   75.497202] Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE
>> [   75.498077] sd 2:0:0:4: [sdc]
>> [   75.498948] Sense Key : Aborted Command [current]
>> [   75.499818] sd 2:0:0:4: [sdc]
>> [   75.500374] Add. Sense: I/O process terminated
>> [   75.500374] sd 2:0:0:4: [sdc] CDB:
>> [   75.500374] Write same(16): 93 08 00 00 00 00 03 7f ff f9 00 7f ff ff
>> 00 00
>> [   75.500374] end_request: I/O error, dev sdc, sector 58720249
>
> Could you add 'debug ms = 1', 'debug rbd = 20', and 'log file =
> /tmp/librbd.log' to the [client] section of your ceph.conf?
>
> That log should tell us where the error is happening.

Thanks - here it comes:
https://www.dropbox.com/s/blegk8u14n30ntq/librbd.log.gz

Hope that helps and we can fix it before 0.54.

Greets
Stefan