Symantec Veritas Cluster Server One, Installation Manual

Page: 156 / 210

156 Troubleshooting
Troubleshooting I/O fencing
Adding or removing coordinator disks
This section describes how to destroy or replace a coordinator disk in the
coordinator disk group.
Adding or removing coordinator disks requires all services be shut down.
In the following procedure:
■
A coordinator disk group requires an odd number (three minimum) of disks
or LUNs.
■
When you add a disk, add it to the coordinator disk group (
vxfencoorddg
,
for example) and retest the group for SCSI-3 persistent reservation support.
■ You can destroy the coordinator disk group so that no registration keys
remain on the disks. The disks can then be used elsewhere.
To remove and replace a disk in the coordinator disk group
1 Log in as root user on one of the systems in the Policy Master cluster.
2 If VCS is running, shut it down:
hastop -all
3 Stop I/O fencing on all systems. Do one of the following:
On Solaris:
# /etc/init.d/vxfen stop
On Linux:
# service vxfen stop
On AIX:
# /etc/rc.d/rc2.d/S97vxfen stop
On HP-UX:
# /sbin/init.d/vxfen stop
This removes any registration keys on the disks.
4 Import the coordinator disk group. The file
/etc/vxfendg
includes the
disk group (for example,
vxfencoorddg
) that contains the coordinator
disks. Enter the following:
vxdg -tfC import ‘cat /etc/vxfendg‘
where:
5 To remove disks from the disk group, use the VxVM disk administrator
utility, vxdiskadm.
-t
Specifies that the disk group is imported only until the system restarts.
-f
Specifies that the import is to be done forcibly, which is necessary if one or
more disks is not accessible.
-c
Specifies that any import blocks are removed.