Importing "orphan" LUNs

[J Pashturro]

I have two HPUX 11.0 servers on a fiber fabric. The first server is dead and I would like to bring up the LUNS currently attached to it on the second server. While I can see the LUNs with an ioscan, is there a simple way to re-attach them?

[Steven E. Protter]

Shalom,

You should be able to use vgimport on the lun.

I'd set up a volume group manually with mknod and all and then try a vgimport.

SEP

[Sandman!]

What kind of a storage array do you have? Are you running MCSG by any chance? For most arrays this should be seamless if the VGs were created on the 1st node but were vgexport'ed/vgimport'ed on to the 2nd node.

[Sheriff Andy]

Do you have the map files for the volume groups?

If so do make sure you mkdir/ mknod the volume group, then vgimport;

cd /dev
mkdir vg_lun1
mknod vg_lun1/group c 64 0xnn0000 (nn is the minor node number you had for the original server)
vgimport -p -v -s -m /tmp/vg_lun1.map vg_lun1

[J Pashturro]

The LUNs are on a NetApp SAN.

Where would I find the map files?

[Sheriff Andy]

Map files are usually created manually from the original server. This is created by doing something like;

# vgexport -p -v -s -m /tmp/vg_lun1.map vg_lun

You might check in the /etc/lvmconf (if you can get into the dead server at all).

If you use the -s option it will give you your VGID. With this you can bring back the volume group from the dead server.

Andy

[Sheriff Andy]

J,

You can use this DOCID if you don't have any mapfiles.

DOCID: 3100427608

This does assume that you know the Volume Group names and their respective minor node numbers.