[Pacemaker] error with cib synchronisation on disk

[Халезов Иван]

Hello everyone!

Some problems occured with synchronisation CIB configuration to disk.
I have this errors in pacemaker's logfile:

/May 14 13:29:13 iblade6 cluster:    error: validate_cib_digest: Digest 
comparision failed: expected 2c91194022c98636f90df9dd5e7176c6 
(/var/lib/heartbeat/crm/cib.Zm249H), calculated bc1
60870924630b3907c8cb1c3128eee
May 14 13:29:13 iblade6 cluster:    error: retrieveCib: Checksum of 
/var/lib/heartbeat/crm/cib.a024wF failed!  Configuration contents ignored!
May 14 13:29:13 iblade6 cluster:    error: retrieveCib: Usually this is 
caused by manual changes, please refer to 
http://clusterlabs.org/wiki/FAQ#cib_changes_detected
May 14 13:29:13 iblade6 cluster:    error: crm_abort: 
write_cib_contents: Triggered fatal assert at io.c:662 : 
retrieveCib(tmp1, tmp2, FALSE) != NULL
May 14 13:29:13 iblade6 pengine[2852]:   notice: process_pe_message: 
Transition 41: PEngine Input stored in: /var/lib/pengine/pe-input-452.bz2
May 14 13:29:13 iblade6 cib[2848]:    error: cib_diskwrite_complete: 
Disk write failed: status=134, signo=6, exitcode=0
May 14 13:29:13 iblade6 cib[2848]:    error: cib_diskwrite_complete: 
Disabling disk writes after write failure/


I didn't find anything about it, at this link: 
http://clusterlabs.org/wiki/FAQ#cib_changes_detected

What can be the reason of this error?
Why the checksum of a cib file can be wrong?
Is it a problem of a hdd, or pacemaker bug or something else? (there are 
no disk or filesystem errors in syslog)

I had a pair of such incidents during the last week.


My cluster installation:  CentOS 6.4 x86_64, pacemaker 1.1.7, corosync 2.3.0

Thank you in advance!

Ivan Khalezov.
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