I am using VxFS, here is mount output for that FS.

/local/oracle/oradata on /dev/vx/dsk/oradg/ORACLE_DATA read/write/setuid/devices/convosync=direct/delaylog/largefiles/ioerror=mwdisable/dev=46ca029 on Sun Feb 15 07:52:49 2009

Thanks
CSReddy