使用linux文件句柄恢复oracle数据文件
使用linux文件句柄恢复oracle数据文件'
查看当前数据文件
[oracle@zhongwc ~]$ sqlplus / as sysdba
sql*plus: release 11.2.0.3.0 production on tue jan 15 11:14:48 2013
copyright (c) 1982, 2011, oracle.  all rights reserved.
connected to: 
oracle database 11g enterprise edition release 11.2.0.3.0 - 64bit production 
with the partitioning, olap, data mining and real application testing options
sql> col tablespace_name format a10 
sql> col file_name format a50 
sql> select open_mode from v$database;
open_mode 
-------------------- 
read write
sql> select file_name,tablespace_name,status from dba_data_files;
file_name                      tablespace status 
-------------------------------------------------- ---------- --------- 
/u01/app/oracle/oradata/zwc/users01.dbf        users      available 
/u01/app/oracle/oradata/zwc/undotbs01.dbf      undotbs1  available 
/u01/app/oracle/oradata/zwc/sysaux01.dbf      sysaux    available 
/u01/app/oracle/oradata/zwc/system01.dbf      system    available 
/u01/app/oracle/oradata/zwc/example01.dbf      example    available 
删除普通数据表空间的数据文件
sql> !rm -r /u01/app/oracle/oradata/zwc/users01.dbf
sql> !rm -r /u01/app/oracle/oradata/zwc/example01.dbf 
查看文件句柄,发现users01.dbf和example01.dbf状态为delete,切记不要shutdown实例
[oracle@zhongwc ~]$ ps -ef|grep dbw|grep -v grep |awk '{print $2}' 
2858 
[oracle@zhongwc ~]$ ls -l /proc/2858/fd 
total 0 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 0 -> /dev/null 
l-wx------ 1 oracle oinstall 64 jan 15 11:20 1 -> /dev/null 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 10 -> /dev/zero 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 11 -> /dev/zero 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 12 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/orazhs.msb 
lrwx------ 1 oracle oinstall 64 jan 15 11:20 13 -> /u01/app/oracle/product/11.2.0/db_1/dbs/hc_zwc.dat 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 14 -> /proc/2858/fd/ 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 15 -> /dev/zero 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 16 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/oraus.msb 
lrwx------ 1 oracle oinstall 64 jan 15 11:20 17 -> /u01/app/oracle/product/11.2.0/db_1/dbs/hc_zwc.dat 
lrwx------ 1 oracle oinstall 64 jan 15 11:20 18 -> /u01/app/oracle/product/11.2.0/db_1/dbs/lkzwc 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 19 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/orazhs.msb 
l-wx------ 1 oracle oinstall 64 jan 15 11:20 2 -> /dev/null 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 20 -> /u01/app/oracle/product/11.2.0/db_1/rdbms/mesg/oraus.msb 
lrwx------ 1 oracle oinstall 64 jan 15 11:20 256 -> /u01/app/oracle/oradata/zwc/control01.ctl 
lrwx------ 1 oracle oinstall 64 jan 15 11:20 257 -> /u01/app/oracle/fast_recovery_area/zwc/control02.ctl 
lrwx------ 1 oracle oinstall 64 jan 15 11:20 258 -> /u01/app/oracle/oradata/zwc/system01.dbf 
lrwx------ 1 oracle oinstall 64 jan 15 11:20 259 -> /u01/app/oracle/oradata/zwc/sysaux01.dbf 
lrwx------ 1 oracle oinstall 64 jan 15 11:20 260 -> /u01/app/oracle/oradata/zwc/undotbs01.dbf 
lrwx------ 1 oracle oinstall 64 jan 15 11:20 261 -> /u01/app/oracle/oradata/zwc/users01.dbf (deleted) 
lrwx------ 1 oracle oinstall 64 jan 15 11:20 262 -> /u01/app/oracle/oradata/zwc/example01.dbf (deleted) 
lrwx------ 1 oracle oinstall 64 jan 15 11:20 263 -> /u01/app/oracle/oradata/zwc/temp01.dbf 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 3 -> /dev/null 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 4 -> /dev/null 
lrwx------ 1 oracle oinstall 64 jan 15 11:20 5 -> /u01/app/oracle/product/11.2.0/db_1/dbs/hc_zwc.dat 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 6 -> /dev/null 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 7 -> /dev/null 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 8 -> /dev/null 
lr-x------ 1 oracle oinstall 64 jan 15 11:20 9 -> /dev/null
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