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。