本帖最后由 latch_free 于 2019-11-3 20:55 编辑

数据库执行查询，发现存在坏块：

ERROR:

ORA-01578: ORACLE data block corrupted (file # 5, block # 139)

ORA-01110: data file 5: '/oracle/app/oracle/oradata/t1/t1_01.dbf'

165 rows selected.

分别通过bbed和dbv验证数据库是否存在坏块，并尝试通过bbed修复，结果发现bbed未检测出坏块：

###########bbed

BBED> verify

DBVERIFY - Verification starting

FILE = /oracle/app/oracle/oradata/t1/t1_01.dbf

BLOCK = 1

DBVERIFY - Verification complete

Total Blocks Examined         : 1

Total Blocks Processed (Data) : 0

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

Message 531 not found;  product=RDBMS; facility=BBED

##########dbv

dbv file='/oracle/app/oracle/oradata/t1/t1_01.dbf'

DBVERIFY: Release 12.2.0.1.0 - Production on Sun Nov 3 20:34:49 2019

Copyright (c) 1982, 2017, Oracle and/or its affiliates.  All rights reserved.

DBVERIFY - Verification starting : FILE = /oracle/app/oracle/oradata/t1/t1_01.dbf

Page 139 is marked corrupt

Corrupt block relative dba: 0x0140008b (file 5, block 139)

Bad check value found during dbv:

Data in bad block:

type: 6 format: 2 rdba: 0x0140008b

last change scn: 0x0000.0000.0020a42d seq: 0x2 flg: 0x04

spare3: 0x0

consistency value in tail: 0xa42d0602

check value in block header: 0x36a0

computed block checksum: 0x1f1b

DBVERIFY - Verification complete

Total Pages Examined         : 256

Total Pages Processed (Data) : 117

Total Pages Failing   (Data) : 0

Total Pages Processed (Index): 0

Total Pages Failing   (Index): 0

Total Pages Processed (Other): 137

Total Pages Processed (Seg)  : 0

Total Pages Failing   (Seg)  : 0

Total Pages Empty            : 1

Total Pages Marked Corrupt   : 1

Total Pages Influx           : 0

Total Pages Encrypted        : 0

Highest block SCN            : 2139233 (0.2139233)

这是什么原因呢？