SQL> startup
ORACLE instance started.
Total System Global Area 213909504 bytes
Fixed Size 1266656 bytes
Variable Size 159386656 bytes
Database Buffers 50331648 bytes
Redo Buffers 2924544 bytes
Database mounted.
ORA-01122: database file 7 failed verification check
ORA-01110: data file 7: '/u02/oradata/crmdb/test01.dbf'
ORA-01200: actual file size of 99 is smaller than correct size of 1280 blocks
方法一：有備份直接還原
方法二：沒有備份，而且這個文件沒用
SQL> alter database datafile 7 offline drop;
Database altered.
SQL> select status from v$Instance;
STATUS
------------
MOUNTED
SQL> alter database open;
Database altered.
方法三：沒有備份，數據文件丟失的部分都是沒有使用過的
[oracle@localhost crmdb]$ dd if=/dev/zero f= test01.dbf bs=8k seek=100 count=1181
讀入了 1181+0 個塊
輸出了 1181+0 個塊
SQL> alter database open;
Database altered.
當使用第三種方式修復後，使用DBV或者做rman時候將會提示：
RMAN> backup datafile 7;
Starting backup at 21-JAN-10
using channel ORA_DISK_1
channel ORA_DISK_1: starting full datafile backupset
channel ORA_DISK_1: specifying datafile(s) in backupset
input datafile fno=00007 name=/u02/oradata/crmdb/test01.dbf
channel ORA_DISK_1: starting piece 1 at 21-JAN-10
RMAN-00571: ===========================================================
RMAN-00569: =============== ERROR MESSAGE STACK FOLLOWS ===============
RMAN-00571: ===========================================================
RMAN-03009: failure of backup command on ORA_DISK_1 channel at 01/21/2010 09:44:00
ORA-19566: exceeded limit of 0 corrupt blocks for file /u02/oradata/crmdb/test01.dbf
DBV:
DBVERIFY - Verification complete
Total Pages Examined : 1280
Total Pages Processed (Data) : 1126
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 0
Total Pages Failing (Index): 0
Total Pages Processed (Other): 34
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 0
Total Pages Marked Corrupt : 120
Total Pages Influx : 0
Highest block SCN : 2332545757 (2576.2332545757)
此時執行：
create table for_fix2(a char(2)) tablespace test
SQL> begin
2 loop
3 insert into for_fix2 values(1);
4 commit;
5 end loop;
6 end;
7 /
alter system checkpoint;
DBVERIFY - Verification complete
Total Pages Examined : 1280
Total Pages Processed (Data) : 1236
Total Pages Failing (Data) : 0
Total Pages Processed (Index): 0
Total Pages Failing (Index): 0
Total Pages Processed (Other): 44
Total Pages Processed (Seg) : 0
Total Pages Failing (Seg) : 0
Total Pages Empty : 0
Total Pages Marked Corrupt : 0
Total Pages Influx : 0
Highest block SCN : 2332687823 (2576.2332687823)
RMAN> backup datafile 7; Starting backup at 21-JAN-10 using channel ORA_DISK_1 channel ORA_DISK_1: starting full datafile backupset channel ORA_DISK_1: specifying datafile(s) in backupset input datafile fno=00007 name=/u02/oradata/crmdb/test01.dbf channel ORA_DISK_1: starting piece 1 at 21-JAN-10 channel ORA_DISK_1: finished piece 1 at 21-JAN-10 piece handle=/u01/app/oracle/dbs/19l40pm1_1_1 tag=TAG20100121T103439 comment=NONE channel ORA_DISK_1: backup set complete, elapsed time: 00:00:03 Finished backup at 21-JAN-10 Starting Control File and SPFILE Autobackup at 21-JAN-10 piece handle=/usr/Oracle/backup/script/full_back/auto_c_c-3778963517-20100121-00.bak comment=NONE Finished Control File and SPFILE Autobackup at 21-JAN-10 RMAN>