# examine fencing disks status and confirm there exists no error before beginning
vxfenadm -d

# import fencing disks to proceed
vxdg -tfC import vxfencoorddg

# disable fencing disks by setting "Coordinator=off"
vxdg -g vxfencoorddg set coordinator=off

# add new fencing disks to disk group
vxdg -g vxfencoorddg adddisk disk_2
vxdg -g vxfencoorddg adddisk disk_3
vxdg -g vxfencoorddg adddisk disk_4

# remove old fencing disks
vxdg -g vxfencoorddg rmdisk hitachi_usp-v0_52cc
vxdg -g vxfencoorddg rmdisk hitachi_usp-v0_52cd
vxdg -g vxfencoorddg rmdisk hitachi_usp-v0_52ce

# enable new fencing disks by setting "Coordinator=on"
vxdg -g vxfencoorddg set coordinator=on

# deport fencing disks
vxdg deport vxfencoorddg


# Make HW test at new fencing disks but root user keyless ssh must be enabled at all cluster nodes.
vxfentsthdw -c vxfencoorddg

# If test says OK, replace fencing disks
/opt/VRTSvcs/vxfen/bin/vxfenswap -g vxfencoorddg

# remove old fencing disks from the system
vxdisk rm hitachi_usp-v0_5294
vxdisk rm hitachi_usp-v0_5199
vxdisk rm hitachi_usp-v0_5199