How to find the physical corruption
Hello
I backup sed post order for physical corruption in my database as follows.
backup validate check logical database;
After his command, I asked v$ database_block_corruption.
12:04:47 SQL> select * from v$database_block_corruption; FILE# BLOCK# BLOCKS CORRUPTION_CHANGE# CORRUPTIO ---------- ---------- ---------- ------------------ --------- 1 11477 2 228760588 LOGICAL 1 11514 1 228760329 LOGICAL 12:05:09 SQL>
I'm looking for if it is a physical corruption of logical corruption?
I also used the dbv command to check my system datafile (file # 1). And the output is as foolows
D:\>dbv file=D:\ORACLE\ORADATA\OPERA\SYSTEM01.DBf DBVERIFY: Release 10.2.0.4.0 - Production on Mon Nov 18 11:56:23 2013 Copyright (c) 1982, 2007, Oracle. All rights reserved. DBVERIFY - Verification starting : FILE = D:\ORACLE\ORADATA\OPERA\SYSTEM01.DBf DBV-00200: Block, DBA 4205781, already marked corrupt DBV-00200: Block, DBA 4205782, already marked corrupt DBV-00200: Block, DBA 4205818, already marked corrupt DBVERIFY - Verification complete Total Pages Examined : 168960 Total Pages Processed (Data) : 127180 Total Pages Failing (Data) : 0 Total Pages Processed (Index): 25248 Total Pages Failing (Index): 0 Total Pages Processed (Other): 2440 Total Pages Processed (Seg) : 0 Total Pages Failing (Seg) : 0 Total Pages Empty : 14092 Total Pages Marked Corrupt : 3 Total Pages Influx : 0 Highest block SCN : 245793757 (0.245793757)
As dbv always checks the physical corruption, but how can I make sure using RMAn that whatever physical corruption of only logical corruption? Thank you
Alert log say something like the following
Sat Sep 14 00:22:50 2013
Errors in the d:\oracle\admin\opera\bdump\opera_p008_3916.trc file:
ORA-01578: block ORACLE (corrupted file # 1, block # 11478) data
ORA-01110: data file 1: ' D:\ORACLE\ORADATA\OPERA\SYSTEM01. DBF'
ORA-10564: tablespace SYSTEM
ORA-01110: data file 1: ' D:\ORACLE\ORADATA\OPERA\SYSTEM01. DBF'
"ORA-10561: TRANSACTION SUCCESSFUL DATA block type ' BLOCK ', object # 5121 data."
ORA-00607: an internal error occurred in making a change to a data block
[ORA-00600: internal error code, arguments: [kddummy_blkchk], [1], [11478], [6101], [], [], []]
SAQ
Hello
DBVerify reports two logical corruptions and physical intra-block by default. A good starting point would be to go through the MOS score below to understand.
Logical and physical block corruptions. Everything you wanted to know on this subject. (Doc ID 840978.1)
Basically, you will not be able to read data in the blocks in physical corruption corrupt some time may be able to read the data into logical corruption.
In addition, DBVerify report the errors of DBV-200/201 to logical corruption.
HTH
Abhishek
Tags: Database
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