Help Fix 26473 Corrupt blocks in system09.dbf

Question

How to Format Corrupted Block Not Part of Any Segment [ID 336133.1]
I'm following the above doc to fix 26K corrupt blocks in system09.dbf
in Step 7 of the Doc it says:
+" First find the *extent size* by querying dba_free_space "+
+65536 = If its 64 K+
+1048576 = 1M+
I'm getting 891559936 with the following query:
SQL> Select bytes from dba_free_space where file_id= 352 and 192128 between block_id and block_id + blocks -1;
BYTES
891559936
What will be my extent size?
I'm lost on how to proceed with the following steps:
BEGIN
for i in 1..1000000 loop
EXECUTE IMMEDIATE 'alter table apps.s allocate extent (DATAFILE '||'''/oracle/KPSO/db/apps_st/data/system09.dbf''' ||'SIZE 64K) ';
end loop;
end ;
+/+
Note you need to change accordingly the size (1M ,64K or 128k) and the value of for loop
can be changed as per requirement.
Thanks.
-Joey-

Answer 1

>
currently doing another round of steps 5-9 to see if it will wipe out all the corrupt blocks.Just want to give an update:
Datafile was completely free of corruption after 2 more passes ..
$ dbv file=/oracle/KPSO/db/apps_st/data/system09.dbf blocksize=8192
DBVERIFY: Release 11.1.0.7.0 - Production on Thu Mar 22 05:08:56 2012
Copyright (c) 1982, 2007, Oracle. All rights reserved.
DBVERIFY - Verification starting : FILE = /oracle/KPSO/db/apps_st/data/system09.dbf
DBVERIFY - Verification complete
Total Pages Examined : 192128
Total Pages Processed (Data) : 160979
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 26455
Total Pages Failing (Index): 0
Total Pages Processed (Other): 2124
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 2570
Total Pages Marked Corrupt : 0
Total Pages Influx : 0
Total Pages Encrypted : 0
Highest block SCN : 3757005752 (1388.3757005752)