topic Re: AUTOraid boot time in Disk Enclosures

AUTOraid boot time

Richard Munn — Mon, 11 Oct 2004 21:54:05 GMT

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.

Re: AUTOraid boot time

Steven E. Protter — Mon, 11 Oct 2004 22:23:49 GMT

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

Re: AUTOraid boot time

Yogeeraj_1 — Tue, 12 Oct 2004 01:19:05 GMT

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

Re: AUTOraid boot time

Bharat Katkar — Tue, 12 Oct 2004 02:18:51 GMT

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,

Re: AUTOraid boot time

Richard Munn — Tue, 12 Oct 2004 17:26:45 GMT

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.