ORA-19554, ORA-27211: Failed to load Media Management Library

Error text:

RMAN-03009: failure of allocate command on t1 channel at 03/30/2011 15:18:21
ORA-19554: error allocating device, device type: SBT_TAPE, device name:
ORA-27211: Failed to load Media Management Library
Additional information:2

Solution:

/usr/openv/netbackup/bin/libobk.so64 should have r-xr-xr-x

Or make link in $ORACLE_HOME/lib

cd $ORACLE_HOME/lib
ln -s /usr/openv/netbackup/bin/libobk.so64 libobk.so