本帖最后由 saintfl 于 2016-9-6 18:34 编辑

数据库可以正常open，但是log中有ORA-01578: ORACLE data block corrupted (file # 1, block # 572023)

ORA-01110: data file 1: '/data/ora/system01.dbf'

数据无法IMPDP出来，检测的确system01中有这个坏块。

$ dbv file=/data/ora/system01.dbf blocksize=8192

DBVERIFY: Release 10.2.0.5.0 - Production on Mon Sep 5 12:33:37 2016

Copyright (c) 1982, 2007, Oracle.  All rights reserved.

DBVERIFY - Verification starting : FILE = /data/ora/system01.dbf

DBV-00200: Block, DBA 4766327, already marked corrupt

csc(0x0001.fad921f2) higher than block scn(0x0000.00000000)

Page 572023 failed with check code 6054

DBVERIFY - Verification complete

Total Pages Examined         : 1745920

Total Pages Processed (Data) : 525746

Total Pages Failing   (Data) : 1

Total Pages Processed (Index): 616854

Total Pages Failing   (Index): 0

Total Pages Processed (Other): 587850

Total Pages Processed (Seg)  : 1

Total Pages Failing   (Seg)  : 0

Total Pages Empty            : 15470

Total Pages Marked Corrupt   : 1

Total Pages Influx           : 0

Highest block SCN            : 664818854 (2.664818854)

channel ORA_DISK_1: backup set complete, elapsed time: 00:00:02

Finished backup at 05-SEP-16

SQL> select * from V$DATABASE_BLOCK_CORRUPTION;

FILE#     BLOCK#          BLOCKS CORRUPTION_CHANGE# CORRUPTIO

---------- ---------- ---------- ------------------ ---------

1     572023               1                  0 CORRUPT

但是BBED校验这个块却不是坏块，这是什么原因？为什么？

BBED> verify

DBVERIFY - Verification starting

FILE = /data/ora/system01.dbf

BLOCK = 572023

Block Checking: DBA = 4766327, Block Type = KTB-managed data block

Found block already marked corrupted

DBVERIFY - Verification complete

Total Blocks Examined         : 1

Total Blocks Processed (Data) : 1

Total Blocks Failing   (Data) : 0

Total Blocks Processed (Index): 0

Total Blocks Failing   (Index): 0

Total Blocks Empty            : 0

Total Blocks Marked Corrupt   : 0

Total Blocks Influx           : 0

查看块的对象也是报错

SQL> SELECT OWNER, SEGMENT_NAME, SEGMENT_TYPE, TABLESPACE_NAME, A.PARTITION_NAME

FROM DBA_EXTENTS A

WHERE FILE_ID = 1

AND 572023 BETWEEN BLOCK_ID AND BLOCK_ID + BLOCKS - 1;  2    3    4

ERROR:

ORA-01578: ORACLE data block corrupted (file # 1, block # 572023)

ORA-01110: data file 1: '/data/ora/system01.dbf'