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10-13-2010 10:42 PM
10-13-2010 10:42 PM
syslog warning message
Our SAP production node syslog having the following warning message:
Oct 14 11:51:15 SAPDBCI cmcld: WARNING: Cluster lock disk /dev/dsk/c21t0d0 has failed: I/O error
Oct 14 11:51:15 SAPDBCI cmcld: Until it is fixed, a single failure could
Oct 14 11:51:15 SAPDBCI cmcld: cause all nodes in the cluster to crash
Info: Server model-rp7420, OS-HPUX 11.11
At present server is running well with all the SAP applications. But, as its our active node of SAP production, I wanna know the root cause of it.
Any suggestion from anyone.
Rgds-Kranti
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10-13-2010 10:57 PM
10-13-2010 10:57 PM
Re: syslog warning message
From the log file,
>>disk /dev/dsk/c21t0d0 has failed: I/O error>>
So you can start with checking the status of the mentioned disk, using diskinfo and dd commnds.
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10-14-2010 12:06 AM
10-14-2010 12:06 AM
Re: syslog warning message
Please check the I/O hits on that perticular disk by sar and timex by that u may get the root cause of this.
Regards
Vishnu Khandare
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10-16-2010 08:02 AM
10-16-2010 08:02 AM
Re: syslog warning message
do
#dd if=/dev/dsk/c21t0d0 of=dev/null bs=1024 count=10224
check your getting any error.
do
#diskinfo /dev/rdsk/c21t0d0.
if both above command given failes then you need to take urgent action as this disk is cluster lock.
Replacement of disk can be done online.
Chandra
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10-16-2010 09:06 AM
10-16-2010 09:06 AM
Re: syslog warning message
#diskinfo /dev/rdsk/c21t0d
#dd if=/dev/dsk/c21t0d0 of=dev/null bs=1024 count=10224
check your getting any error..
Replacement of disk is advisable.
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10-17-2010 12:53 AM
10-17-2010 12:53 AM
Re: syslog warning message
(a) Could be DISK problem
Check using dd
(b) Could the I/O path problem
Check you have any alternative paths to this disk from storage is available.
Aneesh