Adding existing LVMs to new system after a reinstall

[Jay Gaffney_4]

Hi

I had a C3000 boot disk died after a power outage. The disk has been replaced and HP-UX 10.20 ( ACE w/ patches applied ) has been reinstalled.

The C3000 previously had an AutoRaid array attached. It has been reattached, the array is recognized by ioscan and SAM. vgscan also sees the array disks, but how do I get these disk back into my physical volumes?

It is unknown exactly where they were mounted; there is no LVM mapping saved from the previous system.

Thoughts, instructions, ideas are all welcome!

THX,

Jay

[Sanjay_6]

Hi Jay,

You can do a vgscan and get info on the VG and lv you had on the disk array. jfs does not save any info about where the lv was last mounted so i guess you have to mount them manually and look at the files / data on it and decide where it should be mounted.

Hope this helps.

Regds

[Christopher McCray_1]

You could recover the map files from a previous backup and try to reimport them. The ideal situation would have been to use an ignte tape you created, which would have recovered the core vg00, including the old lvm inforamtion. Do you, by chance have an ignite tape?

Hope this helps

Chris

[Helen French · Accepted solution]

Hi,

Try this:

# vgscan ( this will report all disks which has LVM informations on it. Print this out and determine which disks are part of which VG)

Create VG group files:
# mkdir /dev/vg01

# mknod /dev/vg01/group c 64 0x010000 ( for creating group file for vg01.)

repeat this steps for each VG. for eg:

# mknod /dev/vg02/group c 64 0x020000 - for vg02

Import/activate volume groups:

# vgimport /dev/vg01 /dev/dsk/cxtxdx /dev/dsk/cxtxdx ( using information from vgscan)

# vgchange -a y vg01
# vgdiaplay -v /dev/vg01

find out LV information from this. Repeat this step for each VG

Mount LVs:
# mkdir /mount_dir ( create mount directories)
# mount /dev/vg01/lvol1 /mount_dir

repeat this step for all LVs. Do an 'fsck' if there is some file system error.

HTH,
Shiju