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Disabling I/O fencing

You may have to disable fencing in the following cases:

• The cluster has been upgraded to the latest SFCFS stack and the storage does not support the SCSI-3 PGR feature.
• During installation fencing was turned on but later disabled.

By default, the VxFEN driver operates with I/O fencing enabled. To disable this feature without removing the coordinator disks, you must create the file /etc/vxfenmode and include a string within the file to notify the VxFEN driver, then stop and restart the driver, as instructed below:

# echo "vxfen_mode=disabled" > /etc/vxfenmode

# /etc/init.d/vxfen stop

# /etc/init.d/vxfen start

Additionally, we recommend removing the /etc/vxfendg file if fencing is to be later reenabled.