The mount command fails for filesystems with option convosync=direct:

# mount /u01/ORACLE/DBX01
UX:vxfs mount: ERROR: V-3-21262: option not supported on this version of vxfs.

Online JFS is not enabled. This is due to an error in /etc/inittab:

vxen::bootwait:/sbin/fs/vxfs/vxenablef -a

Replace this line with the correct one:

vxen::bootwait:/sbin/fs/vxfs5.0/vxenablef -a

Execute it manually for now (as root) for the mount to succeed:

# /sbin/fs/vxfs5.0/vxenablef -a