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AUTOraid boot time

Richard Munn
Frequent Advisor

AUTOraid boot time

I have a serviceguard cluster that is UPS protected including all the attached autoRAID arrays.

We have had a couple of power failures lately and a system engineer insists that the autoRAID's are rebooting although the cluster continues on OK. His observation is that the disks are flshing as if a rebuild occurs but this may be him looking for a problem that is not really there.

Is there any way to tell if the autoRAID did actually restart or not? (I'm an concerned about a possible UPS supply problem to them only). I've been looking through what arraydsp displays etc. but I can't see anything obvious but then again I might be missing the obvious.
4 REPLIES
Steven E. Protter
Exalted Contributor

Re: AUTOraid boot time

If the autoraid is prsenting disk to either node of the cluster and that disk is configured with at least pvcreate:

Then there will be log entries in /var/adm/syslog/syslog.log showing the POWERFAIL message.

dmesg will show the same thing.

There is almost no way presented disk can powerfail without it being logged.

I would suggest a UPS test as soon as it can be scheduled.

SEP
Steven E Protter
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Yogeeraj_1
Honored Contributor

Re: AUTOraid boot time

hi,

you may try the following:

a. Print all log records that occured after 0800 on 12 october
logprint -s 10120800

b. display performance metrics for disk arry serial number . Analyze performance for the time period from 1200 AM to 6:00 PM (1800) on october 12. Using a display interval of 30 minutes

arraydsp -m 10121200 10121800 2

These outputs should also give you messages that you can use to confirm the suspected problem.

hope this helps!
regards
Yogeeraj
No person was ever honoured for what he received. Honour has been the reward for what he gave (clavin coolidge)
Bharat Katkar
Honored Contributor

Re: AUTOraid boot time

Hi,
As already suggested you will get message in /var/adm/syslog/syslog.log file and the best part would be your Event monitoring System EMS if it is running.
Go through that and definitely some messages may appear there.

Regards,
You need to know a lot to actually know how little you know
Richard Munn
Frequent Advisor

Re: AUTOraid boot time

OK this is good.
There are no POWERFAIL messages so I guess that means it did not go down. I guess the problem really is that this system engineer (BTW not a HP CE) convinced management that the autoRAID had gone down. Given there are no alerts in OVO or in the syslog, I suspect the UPS kept everything going. But the most conclusive evidence would be a time stamp for the autoRAID to say when it booted just like we can use uptime to prove the CPU's didn't loose power.