If you plan to use a Mount resource in a firedrill service group, you must add the ReuseMntPt attribute to ArgList and set its value to 1.
To add the ReuseMntPt attribute to the ArgList attribute and set its value to 1
# haconf -makerw
# hatype -modify Mount ArgList -add ReuseMntPt
# hares -modify firedrill_mount_resource_name ReuseMntPt 1
# hares -modify original_mount_resource_name ReuseMntPt 1
# haconf - dump - makero