Disk replace (no mirror)

[Anton Yatsun]

Hi, gentlemens

I have two 146G SCSI disks in rx2620.
They are create one vg00:

vgdisplay -v vg00
--- Volume groups ---
VG Name /dev/vg00
VG Write Access read/write
VG Status available
Max LV 255
Cur LV 12
Open LV 12
Max PV 16
Cur PV 2
Act PV 2
Max PE per PV 4356
VGDA 4
PE Size (Mbytes) 32
Total PE 8692
Alloc PE 8692
Free PE 0
Total PVG 0
Total Spare PVs 0
Total Spare PVs in use 0

--- Logical volumes ---
{skipped}
--- Physical volumes ---
PV Name /dev/dsk/c2t0d0s2
PV Status available
Total PE 4346
Free PE 0
Autoswitch On

PV Name /dev/dsk/c3t2d0s2
PV Status available
Total PE 4346
Free PE 0
Autoswitch On

One of the disks (c2) starts to have I/O errors and should be replaced by new one.

What ways can recommend to do that?

Thanks in advance.

[Jeeshan]

to replace disks from mirrored copy, try the command

# pvchange -a y /dev/dsk/c3t2d0

[Jeeshan]

sorry,

#pvchange -a n <>

[Md. Farhan A Azam]

Which version of HP-UX is in server, and is this a boot disk with mirror or not mirror.

[Ganesan R]

Hi,

If the disk is not mirrored, you will lose the data. If OS files are there in the failed disk, need to recover from ignite backup. You may need to restore from backup once you replace the disk for non-os filesystems.

Refer this link on replacing the disk.

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

[Anton Yatsun]

Hi

System (HP-UX B.11.23 U ia64) have only two disks, put together into vg00. No mirror.
May dd helps or some other possibilities present?

[Pete Randall]

You are going to need to do an Ignite make_tape_recovery in order to get a bootable back-up tape that can be used to rebuild your vg00 after the disk is replaced. If you do not have a local tape drive then you need to do a make_net_recovery to another server. Since your root VG is compromised, there really is no other way to remove and replace the disk while keeping the system up and running.

http://www.docs.hp.com/en/IUX/


Pete

[Ganesan R]

Hi,

Have you taken ignite backup of VG00? Does VG00 has only os related filesystem?

It is not preferred to have unmirrored vg00

[Anton Yatsun]

System now os up and running, so I can take backup at any moment. vg00 have about 10 filesystmes, not only OS.

All filesystems in total use more then 50% of disk space, so I can't add 3rd disk as mirror of vg00.

Yes, I know about mirroring. But the system was setup a years ago by another person.

[Ganesan R · Accepted solution]

Hi,

ok. Few options you can try.

1. Take full ignite backup of vg00.

2. Take the filesystem backup using tar which is there on failed disk

3. If you have free disks/LUNs try mirror both disks with new disks. After successful mirror replace the disk and remirror it.