ORA-27054 While Backup/Restore with RMAN on NFS Mount Point

Common issue with RMAN while working with NFS mount points (Linux/Solaris).

Reason :

Oracle 10G R2 onwards, Oracle checks the options with which a NFS mount is mounted on the filesystem to ensure that no corruption of the database. 

There are no single set of NFS mount options that work across all Oracle platforms 


Check :

The exact checks used for an NFS mounted disk vary between platforms but in general the basic checks will include the following checks

a) The mount table (eg; /etc/mnttab) can be read to check the mount options 
b) The NFS mount is mounted with the "hard" option 
c) The mount options include rsize>=32768 and wsize>=32768 (in /etc/fstab)

Example  192.168.3.1:/oracle/backup/rman    /oracle/backup/rman  nfs     rsize=32768,wsize=32768,timeo=14,intr,bg,retry=16

d) For RAC environments, where NFS disks are supported, the "noac" mount option is used.

Workaround :

sql> alter system set events '10298 trace name context forever, level 32';

or

sql> alter system set events '10298 trace name context forever, level 32' scope=spfile;

or

Set the following event in the init.ora
      event="10298 trace name context forever, level 32"