Oracle Database Discussions

hi all
os :linux
oracle rac node db04
some time can't archive but reboot the system can be ok
and one week have 2 times.
so who can help me

ARC1: Evaluating archive log 4 thread 2 sequence 20910
ARC1: Beginning to archive log 4 thread 2 sequence 20910
Creating archive destination LOG_ARCHIVE_DEST_1: '/arch/2_20910.arc'
ARC1: Completed archiving log 4 thread 2 sequence 20910
Fri Jun 15 11:31:54 2007
Errors in file /opt/oracle/admin/pdm/bdump/pdm2_smon_2708.trc:
ORA-00600: internal error code, arguments: [25012], [3], [0], [], [], [], [], []
Fri Jun 15 11:31:55 2007
ORACLE Instance pdm2 (pid = 14) - Error 600 encountered while recovering transaction (11,

10).
Fri Jun 15 11:31:55 2007
Errors in file /opt/oracle/admin/pdm/bdump/pdm2_smon_2708.trc:
ORA-00600: internal error code, arguments: [25012], [3], [0], [], [], [], [], []
Fri Jun 15 11:31:56 2007
Trace dumping is performing id=[cdmp_20070615113156]
Fri Jun 15 11:32:01 2007
Thread 2 advanced to log sequence 20912
Current log# 6 seq# 20912 mem# 0: /dev/raw/raw17
Fri Jun 15 11:32:01 2007
ARC0: Evaluating archive log 5 thread 2 sequence 20911
ARC0: Beginning to archive log 5 thread 2 sequence 20911
Creating archive destination LOG_ARCHIVE_DEST_1: '/arch/2_20911.arc'
ARC0: I/O error 19502 archiving log 5 to '/arch/2_20911.arc'
zhang jz
ORA-27072: skgfdisp: I/O error
Linux Error: 2: No such file or directory
Additional information: 167936
ORA-19502: write error on file "/arch/2_20911.arc", blockno 167937 (blocksize=512)
ARC0: Archiving not possible: error count exceeded
ARC0: Failed to archive log 5 thread 2 sequence 20911
ARCH: Archival stopped, error occurred. Will continue retrying
Fri Jun 15 11:32:04 2007
ORACLE Instance pdm2 - Archival Error
ARCH: Connecting to console port...
Fri Jun 15 11:32:04 2007
ORA-16038: log 5 sequence# 20911 cannot be archived
ORA-19502: write error on file "", blockno (blocksize=)
ORA-00312: online log 5 thread 2: '/dev/raw/raw16'
ARCH: Connecting to console port...
ARCH:
Fri Jun 15 11:32:04 2007
ORA-16038: log 5 sequence# 20911 cannot be archived
ORA-19502: write error on file "", blockno (blocksize=)
ORA-00312: online log 5 thread 2: '/dev/raw/raw16'
Fri Jun 15 11:32:04 2007
Errors in file /opt/oracle/admin/pdm/bdump/pdm2_arc0_2716.trc:
ORA-16038: log 5 sequence# 20911 cannot be archived
ORA-19502: write error on file "", blockno (blocksize=)