SG Cluster shared disk to add

[HP UNIX Professionals]

Hi Team,

I am new to the SG Cluster Environment. we have 3 node cluster environment, We are planning to add new 2 disk to the (c16t0d2 and c18t0d2) to the shared disk( /dev/dgpkg2) having 200 GB. Anybody help me to do this activity.

1.What are the command to be used for adding c16t0d2 and c18t0d2 to the /dev/dgpkg2
2.How to populate this disk information to another nods
2.What are the precaution to taken before adding the disk

[Steven E. Protter]

Shalom,

You need to do this.

pvcreate both disks on one node.
vgextend current volume group activated by dgpk2 to these two new disks.

Then

vgexport the volume group with -p -m mapfile options
-p does it in preview mode and -m generates a map file

copy the map file from create node to other two nodes.

vgimport the shared volume group that is activated by package dgpk2

Precautions:
Notify user community in case something goes wrong and the cluster or package shuts down.
Get a good backup of all data before starting.

SEP

[Prashanth Waugh]

Hi,

pvcreate /dev/rdsk/c16t0d2
pvcreate /dev/rdsk/c18t0d2

vgextend /dev/dgpkg2 /dev/dsk/c16t0d2
vgextend /dev/dgpkg2 /dev/dsk/c18t0d2

check #cmviewcl


on primary node
ll /dev/dgpkg2/group
use the same minor no on secondary node
vgexport -v -s -p -m /tmp/dgpkg2.map /dev/dgpkg2

on secondary node
vgexport /dev/dgpkg2
ll /dev/dgpkg2/group
note down the minor no . use the same it on this node (0x220000 i assumed here but u check in ur setup)
mkdir /dev/dgpkg2
mknod /dev/dgpkg2/group c 64 0x220000
vgimport -s -m /tmp/dgpkg2.map /dev/dgpkg2

if u have configer failover policy for third node also then u need to do the
on third node also below step

vgexport /dev/dgpkg2
mkdir /dev/dgpkg2
ll /dev/dgpkg2
mknod /dev/dgpkg2/group c 64 0x220000
vgimport -s -m /tmp/dgpkg2.map /dev/dgpkg2
-------------------------------------------
prepare the steps by using above command . and paste it on forum if ur not sure abt it so that once again anyone can verify it. and it will avoid the mistake.

Thanks
Prashant

[Ivan Krastev]

You can disable package switching during adding the disks to second and third node and enable it afterwards. But this is only optional.

regards,
ivan

[Lijeesh N G_1]

Hi,

1)What are the command to be used for adding c16t0d2 and c18t0d2 to the /dev/dgpkg2??
===>Are you sure these are different disks. I could see both of the LUNs numbers are same.Please verify it, one may be a alternate path.
>If these are two different disk, follow below steps to add to dgpkg2 from Node1,
===>
Node1#pvcreate /dev/rdsk/c16t0d2
Node1#pvcreate /dev/rdsk/c18t0d2
Node1#vgextend dgpkg2 /dev/dsk/c16t0d2 /dev/dsk/c18t0d2

2)How to populate this disk information to another nods??
===>Export it from present Node(Node1) and import it in another nodes(Node2 and Node3) in ***preview mode***
Node1#vgexport -s -p -m