Sqlplus “/ as sysdba” failing with ORA-09817 error.
bash-3.00$ sqlplus "/ as sysdba"
SQL*Plus: Release 10.2.0.1.0 - Production on Sun Jun 14 14:21:09 2009
ORA-09817: Write to audit file failed.
SVR4 Error: 28: No space left on device
ORA-01075: you are currently logged on
Check the file system space for ORACLE_HOME. It must be 100% full and it is not allowing oracle to create audit files. Try to find out some unwanted file from the file system and remove those. Make some room for new audit files.
Remove .aud, .trc, trm files from the file system
bash-3.00$ find . -name *aud -print|more