ORA-09925: Unable to create audit trail file

Problem Description
Whenever you try to startup the database with pfile then it fails with error RA-09925: Unable to create audit trail file along with Linux Error: 2: No such file or directory.

RMAN> startup force pfile='/oradata2/arjudbapfile.ora';

RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03002: failure of startup command at 08/28/2008 15:02:29
RMAN-04014: startup failed: ORA-09925: Unable to create audit trail file
Linux Error: 2: No such file or directory
Additional information: 9925


Cause of the Problem
The error ORA-09925 indicates that oracle was unable to write the audit information into the audit directory. The audit directory is specified by audit_trail parameter in the initialization parameter. Just after the ORA-09925 if there is some OS error then that is notified. The linux error clearly identified that which is No such file or directory.

Solution of the Problem
There may be several solutions to this problem.
1.Create the approprite directory/location specified by audit_trail initialization parameter from operating system and grant appropriate permission to that directory.

2.Change the location of audit_trail initialization parameter to a valid location in the OS.

If you start your database with pfile then you can easily do this by editing your pfile with an editor and modify the audit_trail parameter.

However if you start your database with an spfile then,
-Create pfile='1.ora' from spfile;
-Edit pfile 1.ora and the location of audit_trail parameter.
-Create spfile from pfile='1.ora'
-Start your database with the spfile.