The vxfenswap utility allows you to replace coordinator disks in a cluster that is online. The utility verifies that the serial number of the new disks are identical on all the nodes and the new disks can support I/O fencing.
This utility also supports server-based fencing.
Refer to the
vxfenswap(1M) manual page.
See Veritas Cluster Server Installation Guide for details on the coordinator disk requirements.
You can replace the coordinator disks without stopping I/O fencing in the following cases:
If you want to replace the coordinator disks when the cluster is offline, you cannot use the vxfenswap utility. You must manually perform the steps that the utility does to replace the coordinator disks.
In such case, the cluster might panic when a split-brain occurs. You can replace the coordinator disks with the same disks using the vxfenswap command. During the disk replacement, the missing keys register again without any risk of data corruption.
In server-based fencing configuration, you can use the vxfenswap utility to perform the following tasks:
If the vxfenswap operation is unsuccessful, then you can use the
-a cancel option of the
vxfenswap command to manually roll back the changes that the vxfenswap utility does.
-a cancelcommand to cancel the vxfenswap operation.
vxfenswap -a cancelcommand to cancel the vxfenswap operation.