The vxfenswap utility allows you to add, remove, and replace coordinator points 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.
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 a case, the cluster might panic when a network partition 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.
If the vxfenswap operation is unsuccessful, then you can use the -a cancel of the vxfenswap command to manually roll back the changes that the vxfenswap utility does.