Symptoms:
- The Oracle database was started without ODM and the Oracle filesystem was mounted as:
/opt/oracle on/dev/vx/dsk/oracle_test/ora_test
read/write/setuid/devices/delaylog/largefiles/ioerror=mwdisable/dev=4789088

- After re-linking Oracle with the ODM library, ODM started OK but thefollowing error was observed:
Oracle instance running with ODM: Veritas5.0.00.00 ODM Library, Version 1.1
PMON started with pid=2, OS id=19040
PSP0 started with pid=3, OS id=19042
MMAN started with pid=4, OSid=19044
DBW0 started with pid=5, OS id=19046
LGWR started with pid=6,OS id=19048
CKPT started with pid=7, OS id=19050
SMON started withpid=8, OS id=19052
RECO started with pid=9, OS id=19054
CJQ0 startedwith pid=10, OS id=19056
MMON started with pid=11, OS id=19058
MMNLstarted with pid=12, OS id=19060
Fri Jan 22 17:13:29 2010
ALTER DATABASEMOUNT
Fri Jan 22 17:13:29 2010
ORA-00202: control file:'/opt/oracle/oradata/odmtest/ctrl/control01.ctl'
ORA-17503: ksfdopn:3 Failed to open file /opt/oracle/oradata/odmtest/ctrl/control01.ctl
ORA-17500: ODMerr:ODM ERROR V-41-3-2-180-2 Filesystem not mounted with ODM/QIO support
FriJan 22 17:13:32 2010
ORA-205 signalled during: ALTER DATABASE MOUNT...

Solution:
As ODM was linked in after starting of Oracle, Oracle database needs to be restarted after remounting the Oracle filesystem.T his will fully enable ODM support on that filesystem.