im using SLES 11 to build up Oracle 11g R2 RAC and using SuSE high avalability extension for ocfs2 packages. when trying to mount shared disks (ocfs2 formatted) with datavolume option (that is required for oracle ocr and voting disks) i'm facing the following error in kernel messages (dmesg):

OCFS2 1.5.0
(15281,0):ocfs2_parse_options:1213 ERROR: Unrecognized mount option "datavolume" or missing value

mounting with datavolume option is REQUIRED for ocr and voting disks , any ideas how to mount with this option?