topic Re: external disk problem in a cluster environment in Operating System - HP-UX

external disk problem in a cluster environment

rana786 — Sat, 20 May 2006 22:44:03 GMT

Hi there,

I had 4 disks (146x4 GB each) in an external storage ds2300. I made mirror. Now I am seeing something wrong with one of disk. I am giving you the command outputs. Please help.

Rgds,
Rana

Re: external disk problem in a cluster environment

Mridul Shrivastava — Sun, 21 May 2006 01:02:04 GMT

It's clear that /dev/dsk/c4t9d0 is showing NO_HW, which means either disk has gone bad or its not seated properly.
The error messages are for this disk and some lvols are showing as stale because those lvols would be using this disk for mirror so i would request you to chech the physical status by reseating it and then run ioscan it should show as CLAIMED.
Then u try to deactivate and activate the vg but even after reseating its not showing as CLAIMED then u have to get the disk replaced and restore the vgconfiguration then activate andexecute vgsync so it will copy all the data to the disk.

Re: external disk problem in a cluster environment

Walker_3 — Sun, 21 May 2006 01:39:37 GMT

Hi Shrivastava,

I have resetted the hard disk but it is not claimed. So I am going to replace the disk with a new one. Could you please tell me what would be my next steps and commands to rebuild it? Will it auto regenarate the mirror or I have to do everything manually?

Should I have to halt the package and cluster?

Regards,
Rana

Re: external disk problem in a cluster environment

Walker_3 — Sun, 21 May 2006 02:30:11 GMT

Hi there,

My new disk is claimed. Please tell me how can I restore the vgconfiguration?

Rgds,
Rana

Re: external disk problem in a cluster environment

Mridul Shrivastava — Sun, 21 May 2006 03:03:52 GMT

pls execute the following command:

#vgcfgrestore -n /dev/rdsk/c4t9d0

It will restore the vg configuration then activate the vg and execute vgsync command so it will create mirror on that.

Re: external disk problem in a cluster environment

Walker_3 — Sun, 21 May 2006 03:29:50 GMT

Hi Shrivastava,

Great. Its working. Whatelse do I need to do? That's it?

Rgds,
Rana

Re: external disk problem in a cluster environment

Chauhan Amit — Mon, 22 May 2006 00:56:41 GMT

Hi Walker ,

Please execute the following command
#vgsync vg01

Now check with the following command for any stale Logical Volume , If none , then nothing more needs to be done.

#vgdisplay - v vg01

-Amit

Re: external disk problem in a cluster environment

Mridul Shrivastava — Mon, 22 May 2006 05:17:49 GMT

Hi,

To copy the data to this newly replaced disk u need to execute the following command
# vgsync

It will copy all the data and as per step of Amit if u execute lvdisplay command u'll find all the extents as current, no stale extents will be there.