Oracle：通过dbv查看数据文件是否有坏块

我们备份的数据文件，可以通过oacle自带的dbv工具来查看是否是好的。

下面实验如下：

环境：oracle10.2.0.1

1.检查数据文件是否有坏块

[oracle@app orcl]$ dbv

DBVERIFY: Release 10.2.0.1.0 - Production on Fri Nov 22 20:59:01 2013

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

Keyword     Description                    (Default)
----------------------------------------------------
FILE        File to Verify                 (NONE)
START       Start Block                    (First Block of File)
END         End Block                      (Last Block of File)
BLOCKSIZE   Logical Block Size             (8192)
LOGFILE     Output Log                     (NONE)
FEEDBACK    Display Progress               (0)
PARFILE     Parameter File                 (NONE)
USERID      Username/Password              (NONE)
SEGMENT_ID  Segment ID (tsn.relfile.block) (NONE)
HIGH_SCN    Highest Block SCN To Verify    (NONE)
            (scn_wrap.scn_base OR scn)

[oracle@app orcl]$ dbv file=users01.dbf feedback=100  

DBVERIFY: Release 10.2.0.1.0 - Production on Fri Nov 22 21:01:11 2013

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

DBVERIFY - Verification starting : FILE = users01.dbf
.......

DBVERIFY - Verification complete

Total Pages Examined         : 640
Total Pages Processed (Data) : 25
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 2
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 32
Total Pages Processed (Seg)  : 0
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 581
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Highest block SCN            : 1377014 (0.1377014)

　

主要关注Total Pages Failing (Seg) : 0  --------这一行

2.检查segment是否有坏块

SQL> desc sys_dba_segs
 Name					   Null?    Type
 ----------------------------------------- -------- ----------------------------
 OWNER						    VARCHAR2(30)
 SEGMENT_NAME					    VARCHAR2(81)
 PARTITION_NAME 				    VARCHAR2(30)
 SEGMENT_TYPE					    VARCHAR2(18)
 SEGMENT_TYPE_ID				    NUMBER
 TABLESPACE_ID					    NUMBER
 TABLESPACE_NAME				    VARCHAR2(30)
 BLOCKSIZE					    NUMBER
 HEADER_FILE					    NUMBER
 HEADER_BLOCK					    NUMBER
 BYTES						    NUMBER
 BLOCKS 					    NUMBER
 EXTENTS					    NUMBER
 INITIAL_EXTENT 				    NUMBER
 NEXT_EXTENT					    NUMBER
 MIN_EXTENTS					    NUMBER
 MAX_EXTENTS					    NUMBER
 PCT_INCREASE					    NUMBER
 FREELISTS					    NUMBER
 FREELIST_GROUPS				    NUMBER
 RELATIVE_FNO					    NUMBER
 BUFFER_POOL_ID 				    NUMBER
 SEGMENT_FLAGS					    NUMBER
 SEGMENT_OBJD					    NUMBER

SQL> col segment_name format a30
SQL> select segment_name,tablespace_id,header_file,header_block from sys_dba_segs where owner='YN';        

SEGMENT_NAME		       TABLESPACE_ID HEADER_FILE HEADER_BLOCK
------------------------------ ------------- ----------- ------------
FRUIT					   4	       4	   59

SQL>

[oracle@app orcl]$ dbv userid=system/yn segment_Id=4.4.59

DBVERIFY: Release 10.2.0.1.0 - Production on Fri Nov 22 21:05:05 2013

Copyright (c) 1982, 2005, Oracle.  All rights reserved.

DBVERIFY - Verification starting : SEGMENT_ID = 4.4.59

DBVERIFY - Verification complete

Total Pages Examined         : 8
Total Pages Processed (Data) : 5
Total Pages Failing   (Data) : 0
Total Pages Processed (Index): 0
Total Pages Failing   (Index): 0
Total Pages Processed (Other): 2
Total Pages Processed (Seg)  : 1
Total Pages Failing   (Seg)  : 0
Total Pages Empty            : 0
Total Pages Marked Corrupt   : 0
Total Pages Influx           : 0
Highest block SCN            : 1377014 (0.1377014)
[oracle@app orcl]$

注：其中的segment_Id=4.4.59 是通过上面sql查询出来的。

另外：dbv只能检查数据文件。