topic Re: VG on cluster in Operating System - HP-UX

VG on cluster

Mauro Gatti — Thu, 31 Jul 2003 09:03:47 GMT

I'd like to know how I could export VG configuration from a cluster node and re-import to another one.
The two nodes havent each one two SCSI card with different card istance. So a disk with special file like c1t1d1 on node A have special file c4t1d1 on node B.

Thank You.

Re: VG on cluster

Enrico P. — Thu, 31 Jul 2003 09:20:39 GMT

Hi,
from the primary node:

# ll /dev//group

sign the minor number of the vg you want export (example 0x010000)

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

# rcp -p /tmp/.map secondary_node:/tmp/

from secondary node:

# mkdir /dev/

# mknod /dev//group c 64 0x010000

# vgimport -v -s -m /tmp/.map

With the -s option you do not need to specify the disk belonging to the VG.
In the other way you can specify the disk with the different special file without -s option:

# vgimport -v -m /tmp/.map /dev/dsk/c4t1d1 /dev/dsk/c4...

Enrico.

Re: VG on cluster

Pete Randall — Thu, 31 Jul 2003 09:24:21 GMT

On the first node, run "vgexport -p -s -m /tmp/vgXX.map /dev/vgXX". You will get a complaint that the VG is still active but that's OK - we're just running in preview mode. Transfer the map file (/tmp/vgXX.map) to the second node. Then run:

mkdir /dev/vgXX
mknod /dev/vgXX/group c 64 0xXX0000
vgimport -s -m /tmp/vgXX.map /dev/vgXX
vgchange -a s /dev/vgXX

I think that should do it.

Pete

Re: VG on cluster

Tim Adamson_1 — Thu, 31 Jul 2003 09:28:29 GMT

Hi,

You don't have to worry that the device files are different on the 2 nodes.

On the primary, vgexport the VG:

# vgexport --p -s -m /tmp/vg01.map /dev/vg01

assuming vg01 is the VG you want to import on the adoptive node.

Copy the file /tmp/vg01.map from the primary node to /tmp on the adoptive node.

On the adoptive node:

# mkdir /dev/vg01
# mknod /dev/vg01/group c 64 0x010000

make sure the group minor number is the same as the primary node (ie, 0x010000 in my example).

vgimport -s -m /tmp/vg01.map /dev/vg01

Things should be fine.

Cheers!

Re: VG on cluster

Enrico P. — Thu, 31 Jul 2003 09:28:38 GMT

Hi,
I forgot a piece of command:

# vgimport -v -s -m /tmp/.map /dev/

or

# vgimport -v -m /tmp/.map /dev/dsk/c4t1d1 /dev/dsk/c4... /dev/

Enrico.

Re: VG on cluster

Enrico P. — Thu, 31 Jul 2003 09:30:47 GMT

and I forgot

# vgexport -v -p -s -m /tmp/.map /dev/

Enrico.