alternate link preoblem...

[Bhushi]

Hi,

One of my disk og vg00 gone bad /dev/dsk/c3t1d0.

Physical volumes ---
PV Name /dev/dsk/c0t1d0
PV Name /dev/dsk/c3t1d0 Alternate Link
PV Status available
Total PE 2170
Free PE 0
Autoswitch On
Proactive Polling On
============================================

crforccd:bb056x pvdisplay -v /dev/dsk/c0t1d0 | more
--- Physical volumes ---
PV Name /dev/dsk/c0t1d0
PV Name /dev/dsk/c3t1d0 Alternate Link
VG Name /dev/vg00
PV Status available
Allocatable yes
VGDA 2
Cur LV 4
PE Size (Mbytes) 4
Total PE 2170
Free PE 0
Allocated PE 2170
Stale PE 0
IO Timeout default
Autoswitch On
Proactive Polling On

--- Distribution of physical volume ---
LV Name LE of LV PE for LV
/dev/vg00/lvol9 1024 1024
/dev/vg00/lvol5 430 430
/dev/vg00/lvol8 512 512
/dev/vg00/lvol13 204 204

===========================================
lvol9,5,8 are mirrrored but lvol13 is not mirrored.
=======================================
which steps I need to perform during the disk replacement.

Please suggest
Thanks
Bharat

[Matti_Kurkela]

The presence of an alternate link indicates the disk might be a LUN in some sort of external storage system.

The exact steps cannot be determined without first knowing the model and configuration of that storage system.

Is the data in lvol13 still readable? If it is, backup or mirror it as soon as possible! If not, you may have already lost the data and need to restore lvol13 from backups.

If that storage system implements an internal hardware RAID 1 or RAID 5 (which would usually be completely hidden from the HP-UX system), the disk replacement procedure might be as simple as:
- pull out the failed disk from the storage system
- install a new disk
- verify that the storage system begins an auto-rebuild; start it manually if necessary
- make sure the rebuild operation completes

I also see this in your profile:
"I have assigned points to 0 of 113 responses to my questions."

MK