bbed的功能很强大,可以通过bbed_wrap来获得数据块记录,相当用途:抢救坏块中的数据
环境准备

[oracle@xifenfei ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.3.0 Production on Thu Jan 12 18:29:50 2012
Copyright (c) 1982, 2011, Oracle.  All rights reserved.
Connected to:
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> conn chf/xifenfei
Connected.
SQL> create table t_xifenfei
  2  as
  3  select object_id,object_name from dba_objects where rownum<20;
Table created.
SQL>  select file_id,block_id,block_id+blocks-1
  2          from dba_extents
  3   where segment_name ='T_XIFENFEI' AND owner='CHF';
   FILE_ID   BLOCK_ID BLOCK_ID+BLOCKS-1
---------- ---------- -----------------
         4        680               687
SQL> alter system checkpoint;
System altered.
--查询记录
SQL> col object_name for a20
SQL> select   object_id,object_name,
  2  dbms_rowid.rowid_relative_fno(rowid)rel_fno,
  3  dbms_rowid.rowid_block_number(rowid)blockno,
  4  dbms_rowid.rowid_row_number(rowid) rowno
  5  from chf.t_xifenfei;
 OBJECT_ID OBJECT_NAME             REL_FNO    BLOCKNO      ROWNO
---------- -------------------- ---------- ---------- ----------
        20 ICOL$                         4        683          0
        46 I_USER1                       4        683          1
        28 CON$                          4        683          2
        15 UNDO$                         4        683          3
        29 C_COBJ#                       4        683          4
         3 I_OBJ#                        4        683          5
        25 PROXY_ROLE_DATA$              4        683          6
        41 I_IND1                        4        683          7
        54 I_CDEF2                       4        683          8
        40 I_OBJ5                        4        683          9
        26 I_PROXY_ROLE_DATA$_1          4        683         10
        17 FILE$                         4        683         11
        13 UET$                          4        683         12
         9 I_FILE#_BLOCK#                4        683         13
        43 I_FILE1                       4        683         14
        51 I_CON1                        4        683         15
        38 I_OBJ3                        4        683         16
         7 I_TS#                         4        683         17
        56 I_CDEF4                       4        683         18
19 rows selected.

bbed参数配置

[oracle@xifenfei ~]$ more bbed_file
         1 /u01/oracle/oradata/ora11g/system01.dbf
         2 /u01/oracle/oradata/ora11g/sysaux01.dbf
         3 /u01/oracle/oradata/ora11g/undotbs01.dbf
         4 /u01/oracle/oradata/ora11g/users01.dbf
         5 /u01/oracle/oradata/ora11g/dbfs01.dbf
[oracle@xifenfei ~]$ more bbed.par
blocksize=8192
listfile=/home/oracle/bbed_file
mode=browse
SILENT=yes
PASSWORD=blockedit

bbed_wrap脚本执行

[oracle@xifenfei ~]$ ./bbed_wrap.sh 4 683 "/rn2cntn"
There are 19 rows in block 683 on file 4
" 20 "," ICOL$"
" 46 "," I_USER1"
" 28 "," CON$"
" 15 "," UNDO$"
" 29 "," C_COBJ#"
" 3 "," I_OBJ#"
" 25 "," PROXY_ROLE_DATA$"
" 41 "," I_IND1"
" 54 "," I_CDEF2"
" 40 "," I_OBJ5"
" 26 "," I_PROXY_ROLE_DATA$_1"
" 17 "," FILE$"
" 13 "," UET$"
" 9 "," I_FILE#_BLOCK#"
" 43 "," I_FILE1"
" 51 "," I_CON1"
" 38 "," I_OBJ3"
" 7 "," I_TS#"
" 56 "," I_CDEF4"
--和我们查询的结果完全一致