topic Re: Restore Cluster Lock Disk in Operating System - HP-UX

Restore Cluster Lock Disk

khilari — Thu, 12 Jan 2006 16:52:54 GMT

Hi people, i wanted to ask as to how you reform a cluster lock disk?

Re: Restore Cluster Lock Disk

Sanjay_6 — Thu, 12 Jan 2006 16:56:05 GMT

Hi,

you replace it like any other disks on the system. Try this link,

http://docs.hp.com/en/B3936-90079/ch08s03.html

Hope this helps.

Regds

Re: Restore Cluster Lock Disk

Sundar_7 — Thu, 12 Jan 2006 16:58:44 GMT

Reform a cluster lock disk ? - are you trying to change the cluster lock disk ?

Get the current cluster configuration file (cmgetconf) - edit it and check it (cmcheckconf) and apply it (cmapplyconf).

Re: Restore Cluster Lock Disk

Sivakumar TS — Thu, 12 Jan 2006 22:49:44 GMT

Hi Mujtaba,

Replacing a failed lock disk is the same as replacing a data disk. If you are using a dedicated lock disk (one with no user data on it), then you need to issue only one LVM command, as in the following example:

# vgcfgrestore -n /dev/vglock /dev/dsk/c2t3d0

Serviceguard checks the lock disk on an hourly basis. After the vgcfgrestore command, review the syslog file of an active cluster node for not more than one hour. Then look for a message showing that the lock disk is healthy again.

You can also do a #cmapplyconf after this.

WIth Regards,

Siva.

Re: Restore Cluster Lock Disk

Nguyen Anh Tien — Fri, 13 Jan 2006 00:02:31 GMT

The document say:
Replacing a failed lock disk mechanism is the same as replacing a data disk. If you are using a dedicated lock disk (one with no user data on it), then you need to issue only one LVM command, as in the following example:

# vgcfgrestore -n /dev/vg_lock /dev/dsk/c2t3d0

Serviceguard checks the lock disk on an hourly basis. After the vgcfgrestore command, review the syslog file of an active cluster node for not more than one hour. Then look for a message showing that the lock disk is healthy again
==============
But I correct it as
# vgcfgrestore -n /dev/vg_lock /dev/rdsk/c2t3d0
Only working with raw disk
HTH

Re: Restore Cluster Lock Disk

Stephen Doud — Fri, 13 Jan 2006 09:25:11 GMT

We could use more information...
Are you replacing the cluster lock disk or otherwise looking to reinstall the cluster lock structures or are you changing the cluster lock disk path to a new disk entirely?
Is the current cluster lock disk path correct? (Use cmviewconf to see what the current paths are)
Do you have the luxury of halting the cluster?

If you simply need to repair the structures on the current cluster lock disk, open a case with the HP response center and request the 'cminitlock' tool.

If you need to change the cluster lock disk paths, update the cluster configuration ASCII file with the correct paths, halt the cluster and cmapplyconf the change.

If you need to change the paths but don't have the luxury to halt the cluster, consider redirecting the old dsk paths to the new path that will support the cluster lock disk function. See document UXSGKBRC00017672 "Emergency fix to alternate Serviceguard cluster lock disk path"