topic Re: New defect sectors in Operating System - HP-UX

New defect sectors

Danl_2 — Sun, 01 Jun 2008 02:02:01 GMT

Hi,

I got the following alert message in my OVO console on a rx7640 running hpux 11.23 OS:

The /dev/rdsk/c14t0d0 has 1024.00 new defect sectors

I did not find any error messages in syslog as well as in dmesg command.
The disk belongs to root VG
I did a dd on the disk and the disk is fine.

$ dd if=/dev/rdsk/c14t0d0 of=/dev/null bs=10240k
10240+1 records in
10240+1 records out
[root@hpx231:/.root]

Can someone tell me what the problem is and how serious the problem is and the solution to fix it.

Thanks in advance.

Re: New defect sectors

Deepak Kulkarni — Sun, 01 Jun 2008 03:58:59 GMT

Hi,

Was there any event logs?

Regards
DK

Re: New defect sectors

Matti_Kurkela — Sun, 01 Jun 2008 07:48:01 GMT

My guess is that this message comes from the EMS event monitoring system. It has detected that the disk's internal defect mapping system has suddenly marked quite a lot of sectors as defective and moved the data in them to spare sectors designed for just this purpose.

This could be your first early warning that the disk is about to fail in the near future. It's hard to predict how fast the failure could happen: it could fail within next month, or next year... or maybe within next hour.

So make sure your backups are OK and your root VG is properly mirrored. If this system is critical for you, you might even make sure you have a correct-model replacement disk easily available, just in case.

MK

Re: New defect sectors

Danl_2 — Mon, 02 Jun 2008 05:06:49 GMT

Hi Deepak,

I could not find any events reported in the syslog.

Hi Matti,

I checked the EMS notifications and could not find any messages related to the disk.

Further help will be much appreciated.