Automatic datafile offline due to write error

Question

Hi,
Our SAP system are down. In the alert.log file, i found that one of the files are being locked by third party backup software.
I'm new to both oracle and basis, pls advise the steps to recover the database. Thank you.
The error in the alert log file:
Errors in file f:\oracle\p02\saptrace\background\p02_lgwr_3896.trc:
ORA-00345: redo log write error block 8404 count 2
ORA-00312: online log 3 thread 1: 'D:\ORACLE\P02\ORIGLOGA\LOG_G13M1.DBF'
ORA-27072: File I/O error
OSD-04008: WriteFile() failure, unable to write to file
O/S-Error: (OS 33) The process cannot access the file because another process has locked a portion of the file.
Sat Oct 25 00:23:12 2008
Errors in file f:\oracle\p02\saptrace\background\p02_lgwr_3896.trc:
ORA-00343: too many errors, log member closed
ORA-00346: log member marked as STALE
ORA-00312: online log 3 thread 1: 'D:\ORACLE\P02\ORIGLOGA\LOG_G13M1.DBF'
Sat Oct 25 00:26:04 2008
Incremental checkpoint up to RBA [0x1c1b.2079.0], current log tail at RBA [0x1c1b.20dc.0]
Sat Oct 25 00:35:18 2008
KCF: write/open error block=0x3f7c6 online=1
     file=5 G:\ORACLE\P02\SAPDATA1\SR3_2\SR3.DATA2
     error=27072 txt: 'OSD-04008: WriteFile() failure, unable to write to file
O/S-Error: (OS 33) The process cannot access the file because another process has locked a portion of the file.'
Automatic datafile offline due to write error on
file 5: G:\ORACLE\P02\SAPDATA1\SR3_2\SR3.DATA2
Sat Oct 25 00:35:19 2008
KCF: write/open error block=0x3f7c4 online=1
     file=5 G:\ORACLE\P02\SAPDATA1\SR3_2\SR3.DATA2
     error=27070 txt: 'OSD-04016: Error queuing an asynchronous I/O request.
O/S-Error: (OS 33) The process cannot access the file because another process has locked a portion of the file.'
Automatic datafile offline due to write error on
file 5: G:\ORACLE\P02\SAPDATA1\SR3_2\SR3.DATA2
Sat Oct 25 00:36:00 2008
KCF: write/open error block=0x37f74 online=1
     file=7 G:\ORACLE\P02\SAPDATA1\SR3_4\SR3.DATA4
     error=27072 txt: 'OSD-04008: WriteFile() failure, unable to write to file
O/S-Error: (OS 33) The process cannot access the file because another process has locked a portion of the file.'
Automatic datafile offline due to write error on
file 7: G:\ORACLE\P02\SAPDATA1\SR3_4\SR3.DATA4
Sat Oct 25 00:45:49 2008
Errors in file f:\oracle\p02\saptrace\usertrace\p02_ora_3876.trc:
ORA-00600: internal error code, arguments: [kdtdelrow-2], [2], [2], [], [], [], [], []
ORA-00376: file 5 cannot be read at this time
ORA-01110: data file 5: 'G:\ORACLE\P02\SAPDATA1\SR3_2\SR3.DATA2'

Answer 1

Hi
As alway use this information for research purposes only.
I presume that Oracle and SAP application servers are down.
Now would be a good time to make a backup image of your crippled system.
This way you can always get back to this state if needed.
So do an offline backup if possible.
It looks like a log file is damaged or deleted. You may find that you have a
mirror image of it so this might not be the end of the world.
If you have oracle up to the mount point e.g.
startup mount
then you should be able to acces the v$logfile
select  GROUP#,STATUS,MEMBER from v$logfile;
This will show you whether the have a mirror setup for the log file you need.
Make sure all the files outlined in this output exist.
e.g. do a DIR in the parant directory.
Post all the output of v$logfile and whether all the files exist.
regards
Stephen