ORA-19504: failed to create file

ARC2: Beginning to archive log 2 thread 1 sequence 68308
Creating archive destination LOG_ARCHIVE_DEST_2: '/oracleerpdb/archive2/KOUSHIKERP_1_68308.arc'
ARC2: Error 19504 Creating archive log file to '/oracleerpdb/archive2/KOUSHIKERP_1_68308.arc'
Mon Apr 30 14:00:27 2007
Errors in file /oradb/oracleerp/oracleerpdb/9.2.0/admin/KOUSHIKERP_krishna/bdump/oracleerp_arc2_7695.trc:
ORA-19504: failed to create file "/oracleerpdb/archive2/KOUSHIKERP_1_68308.arc"
ORA-19504: failed to create file "/oracleerpdb/archive2/KOUSHIKERP_1_68308.arc"
ORA-27044: unable to write the header block of file.






Dump file /oradb/oracleerp/oracleerpdb/9.2.0/admin/KOUSHIKERP_krishna/bdump/oracleerp_arc2_7695.trc
Oracle9i Enterprise Edition Release 9.2.0.5.0 - 64bit Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.5.0 - Production
ORACLE_HOME = /oradb/oracleerp/oracleerpdb/9.2.0
System name: SunOS
Node name: n1
Release: 5.9
Version: Generic_118558-09
Machine: sun4u
Instance name: KOUSHIKERP
Redo thread mounted by this instance: 1
Oracle process number: 21
Unix process pid: 7695, image: oracle@n1 (ARC2)

*** SESSION ID:(20.1) 2007-04-30 14:00:27.897
Failed to create file '/oracleerpdb/archive2/KOUSHIKERP_1_68308.arc' (file not accessible?)
*** 2007-04-30 14:00:27.898
ARC2: Error 19504 Creating archive log file to '/oracleerpdb/archive2/KOUSHIKERP_1_68308.arc'
*** 2007-04-30 14:00:27.898
kcrrfail: dest:2 err:19504 force:0
ORA-19504: failed to create file "/oracleerpdb/archive2/KOUSHIKERP_1_68308.arc"
ORA-19504: failed to create file "/oracleerpdb/archive2/KOUSHIKERP_1_68308.arc"
ORA-27044: unable to write the header block of file
SVR4 Error: 5: I/O error
Additional information: 1.