topic Re: EMS says a disk failure but ioscan shows it as online in Operating System - HP-UX

EMS says a disk failure but ioscan shows it as online

kathykathy — Sat, 31 Dec 2011 05:41:29 GMT

Happy New Year and thanks ahead for your reply.

I get alert from EMS few times so far

>------------ Event Monitoring Service Event Notification ------------<

Notification Time: Fri Dec 30 15:32:12 2011

wpgrx002 sent Event Monitor notification information:

/storage/events/disks/default/64000_0xfa00_0x1

is >= 3.

Its current value is CRITICAL(5).

..........

Summary:

Disk at hardware path 64000/0xfa00/0x1 : Hardware failure

Description of Error:

The device driver has received an unspecified hardware error from the

device.

-----------------------------------------------

But i did a health check and the disk is online.

#: ioscan -P health -H 64000/0xfa00/0x1
Class I H/W Path health
===============================
disk 28 64000/0xfa00/0x1 online

-----------------------------------------------

what should i do to find where the problem is?

basant — Mon, 02 Jan 2012 12:15:05 GMT

Please check following things after that it will confirm disk is faulty or not

1. Check for I/O Errors in the /var/adm/syslog/syslog.log

2. # pvdisplay -l /dev/dsk/faulty disk

/dev/dsk/faulty disk : Lvm_disk=yes

disl is still in vg

3. #vgdisplay -v | more

if disk is faulty , it will show pv status unavailable

4. Try this on faulty disk , if it gives I/O error ,it is faulty

# dd if=/dev/rdsk/c1t3d0 of=/dev/null bs=1024k &

dd read error: I/O error

0+0 records in 0+0 records out

kathykathy — Mon, 13 Feb 2012 19:55:00 GMT

thanks...a reboot fixed the problem.

Arockiasamy K — Fri, 24 Feb 2012 20:04:48 GMT

Might be sone LUN got disturbed/FC link might be down. thats why EMS given some alert.

I think that was a temporary failure. EMS alert is just a happened event. not related to real time like ioscan.