topic Re: disk in cluster in Operating System - HP-UX

disk in cluster

Mohd Rasidi Che Mat — Tue, 25 Nov 2008 09:31:12 GMT

Hi all,
when we add new disk to a cluster, we should initialize it in both nodes, right? however if someone forgot to do it, is there any impact if we do it later when the disk is already used?
let say these disks have been used in node a:
disk 206 0/2/1/0/4/0.21.128.0.0.1.1 sdisk CLAIMED DEVICE HITACHI OPEN-V
disk 213 0/2/1/0/4/0.21.128.0.0.1.2 sdisk CLAIMED DEVICE HITACHI OPEN-V
disk 214 0/2/1/0/4/0.21.128.0.0.1.3 sdisk CLAIMED DEVICE HITACHI OPEN-V*2

can we do "insf -e" later in node b without any impact?

Re: disk in cluster

Ivan Krastev — Tue, 25 Nov 2008 09:34:58 GMT

After adding the disk in node1, do the following:
on both nodes
# ioscan -fnC disk //to recognize the disk
# insf -eC disk // to create device files

On the first node add disk(s) in the cluster volume group, export group in PREVIEW mode to create map file, copy map file to another node.
On the second node export cluster volume group, re-create /dev/XXX/group nodes and import the group.

regards,
ivan

Re: disk in cluster

Johnson Punniyalingam — Tue, 25 Nov 2008 09:50:09 GMT

>>>when we add new disk to a cluster, we should initialize it in both nodes, right?

Yes, You are right.
(that's why we do NodeA"vgexport" -pvs preview mode than "vgimport" on the other NodeB

however if someone forgot to do it, is there any impact if we do it later when the disk is already used? <<<<

No , impact

>>can we do "insf -e" later in node b without any impact?<<

Yes , You Can "NO IMPACT"

insf -e "Installing device files"
also you can do

ioscan -fnC disk

Thanks,
Johnson