Disk replacement

[Waqar Razi]

One of the disk on L class server is going bad. It has some bad sectors on it and I wanna replace it. It is included in vg02 and this volume group has 2 disks included in it and one Logical volume spans both of them.



Can some one please give me steps to do this replace? The OS version is 10.20 and the HD is hot swappable.

[Pete Randall]

http://www.docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf


Pete

[James R. Ferguson]

Hi:

See:

http://docs.hp.com/en/5991-1236/When_Good_Disks_Go_Bad.pdf

Regards!

...JRF...

[Waqar Razi]

I have read that manual but still some things are not clear to me, can some one give me more guidance by providing step by step solution please?

[Jov]

Hi Wagar,

You have to provide more info regarding your setup before we can help.

Is VG02 mirrored? From your comment regarding the volume spanning two disk, and the fact that it only has 2 disk, I am assumming its RAID 0.

If this is the case, I'd immediately shutdown and make a full backup of VG02 before more data will be lost.

You can NOT do this change online as the faulty disk is the only copy.


Jov

[Jeeshan]

what you can in this situation is,

take a full ignite or make_tape backup.

take a nickel output.

then replace the disk and then restore from ignite image.

[Patrick Wallek · Accepted solution]

ahsan said:
**********
what you can in this situation is,

take a full ignite or make_tape backup.

take a nickel output.

then replace the disk and then restore from ignite image.
**********

Actually, no. An ignite backup is NOT recommended here. And you don't need to restore from the Ignite backup.

He said this is VG02, NOT VG00.

The steps I would take are:

1) Shut down whatever application uses VG02 mount points
2) Run a complete backup of VG02 mount points.
3) Replace the disk
4) Run ioscan to make sure the new disk is available.
5) Run vgcfgrestore to restore the configuration to the new disk
6) Run 'vgchange -a y vg02' to make sure vg02 can see the new disk.
7) Restore the data to the disk
8) Restart the applications.

[Jov]

Hi Ahsan,

Good suggestion, but becareful in suggesting Ignite tape recovery without more details.

The default make_tape_recovery will only backup the essential OS files making it quicker to recover, but miss vg02.

To backup vg02, you need the addition of "-x inc_entire=vgXX".

e.g.
make_tape_recovery -I -v -x inc_entire=vg00 -x inc_entire=vg02

Maybe it can be simplified to
make_tape_recovery -I -v -x inc_entire=vg00,vg02

But check the manpages as I dont have access to a HP-UX system to verify.

Jov

[Torsten.]

Something is wrong here.

Either it isn't a L-class server or it doesn't run 10.20. This combination is impossible.

Anyway, I would suggest to "fbackup" the data, replace the disk, restore the disk config (vgcfgrestore), create a new file system on the LVOLs and restore the data.

[Patrick Wallek]

>>Either it isn't a L-class server or it doesn't run 10.20. This combination is impossible.


Hmmm...Good catch, Torsten. I completely missed that little tidbit.