Can we use Cluster lock lun deivce in any volume group?

[Nesan]

Hello,

It is two node cluster, I am trying to create cluster.

When I tried to execte the command cmapplyconf, it fails .

But the disk is not actually used.
I have verified in both nodes.

cmapplyconf -C cluster.ascii
Note : a NODE_TIMEOUT value of 2000000 was found in line 133. This value
is recommended if the top priority is to reform the cluster as fast
as possible in case of failure. If the top priority is to minimize
reformations, consider using a higher setting. For more information see
the cluster configuration ASCII file or the Managing Serviceguard manual.
Device /dev/dsk/c4t2d2 is specified as a lock lun device, but it is used by LVM on node spcmanp1
. Please specify another device for lock lun.
Invalid data for cluster lock LUN configuration
cmapplyconf: Unable to verify cluster file: cluster.ascii.
[root:-/etc/cmcluster]strings /etc/lvmtab | grep c4t2d2
[root:/etc/cmcluster]strings /etc/lvmtab | grep c4t2d3

Thank you
Regards
NS

[melvyn burnard]

You cannot use a PV that has been assigned to an LVM VG as a Lock Lun
You must use a Physical LUN that is not assigned to ANY type of volume manager.
You could of course still use a Cluster Lock Disk, which MUST be part of a an LVM VG

[Nesan]

Thank you Melvyn for your reply.

It says "Device /dev/dsk/c4t2d2 is specified as a lock lun device, but it is used by LVM on node "
eventhough, I haven't used this disk on any volume group.

[melvyn burnard]

well that LUN appears to be marked for use as an LVM disk
make sure you check on the node spcmanp1

You can then either remove it from a VG, or wipe it out using the dd command

[psreedhar]

Use the following commands to know whether a disk has LVM metadata or not

# pvdisplay -l /dev/dsk/c18t0d6
/dev/dsk/c18t0d6:LVM_Disk=yes


If your disk is part of a exported volume group then it might not show up in /etc/lvmtab or /etc/lvmtab_p

[Nesan]

It shows as part of LVM disk. How do i remove it?

[root:-/etc/cmcluster]pvdisplay -l /dev/dsk/c4t2d2
/dev/dsk/c4t2d2:LVM_Disk=yes

Thank you Sreedhar

Regards
Nesan

[melvyn burnard]

use pvremove:
man pvremove::

pvremove - remove LVM data structure from a physical volume

[Nesan]

Thank you guys for your response.

Finally I was able to erase the header by the following command. It started working!.

dd if=/dev/zero of=/dev/rdsk/cXtYdZ bs=128k count=2048

Thank you
Regards
Nesan

[Nesan]

Thank you guys for your response.

Finally I was able to erase the header by the following command. It started working!.

dd if=/dev/zero of=/dev/rdsk/cXtYdZ bs=128k count=2048

for some pvcreate -f didn't erase volume info.

dd command only worked.

Thank you
Regards
Nesan