Regarding cluster lock disk

[Kavita Poonia]

Hello All,

Can we replace bad cluster lock disk online with all packages & cluster running ?

Thanks & regards,
Kavita

[Khalid Shakoor]

Hi Kavita,

You can replace an unusable lock disk while the cluster is running. You can do this
without any cluster reconfiguration if you do not change the devicefile name (Device
Special File, or DSF); or, if you need to change the DSF, you can do the necessary
reconfiguration while the cluster is running.

vgcfgrestore -n /dev/vg_lock /dev/dsk/cXtXdX

where x are your disk path


Serviceguard checks the lock disk every 75 seconds. After using the vgcfgrestore
command, review the syslog file of an active cluster node for not more than 75 seconds.
By this time you should see a message showing that the lock disk is healthy again.

for more details Go for Managing Serviceguard Sixteenth Edition Page 366.

Khalid

[Asif Sharif]

Hi Kavita,

Good Day!

The itrc doc id is UXSGKBAN00000022.

http://www11.itrc.hp.com/service/cki/docDisplay.do?docLocale=en&docId=UXSGKBAN00000022

http://forums11.itrc.hp.com/service/forums/questionanswer.do?admit=109447626+1275891462969+28353475&threadId=1335835

Regards,
Asif Sharif

[Aneesh Mohan]

Hi,

You can replace lock disk online.

Cluster lock disk is only required during cluster reformation .


Aneesh

[Stephen Doud · Accepted solution]

A lock disk structure is installed there using cmapplyconf on the disk designated in the cluster configuration ASCII file (assuming it is a shared disk and configured as a LVM disk in a VG).

Only A.11.19 allows the admin to change the lock disk while the cluster is running. Or, if you have a support contract, open a case with the support center and request the 'cminitlock' utility which can be used while the cluster is running to reinstall the lock structure on the disk. This presumes the path to the lock disk has not changed. If it has changed, use the first method above.

[Kavita Poonia]

Thanks for all the responses !!!