oracle ORA-01200&ORA-01110&ORA-01122

    由于自己本地使用的virtual-box虚拟机，在虚拟机上安装Oracle，物理机偶尔会因为内存问题无响应，就强制断电重启，没想到虚拟机非常规关机导致oracle ORA-01200&ORA-01110&ORA-01122
    启动数据库时报错：
[oracle@oratest ~]$ sqlplus / as sysdba
SQL*Plus: Release 11.2.0.4.0 Production on Thu Apr 6 11:32:03 2017
Copyright (c) 1982, 2013, Oracle.  All rights reserved.
Connected to an idle instance.
SQL> startup
ORACLE instance started.
Total System Global Area  839282688 bytes
Fixed Size    2257880 bytes
Variable Size  545262632 bytes
Database Buffers  289406976 bytes
Redo Buffers    2355200 bytes
Database mounted.
ORA-01122: database file 2 failed verification check
ORA-01110: data file 2: '/oradata/oracle/oradata/oradb/sysaux01.dbf'
ORA-01200: actual file size of 62720 is smaller than correct size of 66560 blocks
报错提示数据库记录 /oradata/oracle/oradata/oradb/sysaux01.dbf的大小是66560而实际大小是62720，此种报错有个简单的解决方法，就是通过dd修改报错相关的数据文件，改成数据库期望的大小，瞒过oracle：
SQL> select 66560 - 62720 from dual;
66560-62720
-----------
       3840
SQL> !dd if=/dev/zero of=/oradata/oracle/oradata/oradb/sysaux01.dbf bs=8192 count=3840 seek=62721 --bs是数据库块大小，count是差值，seek是从哪开始填充0
3840+0 records in
3840+0 records out
31457280 bytes (31 MB) copied, 0.02607 seconds, 1.2 GB/s
SQL> alter database open;
Database altered.
SQL> shutdown immediate;
Database closed.
Database dismounted.
ORACLE instance shut down.
SQL> startup;
ORACLE instance started.
Total System Global Area  839282688 bytes
Fixed Size    2257880 bytes
Variable Size  545262632 bytes
Database Buffers  289406976 bytes
Redo Buffers    2355200 bytes
Database mounted.
Database opened.
SQL> select count(*) from dba_users;
  COUNT(*)
----------
30
SQL> select count(*) from dba_data_files;
  COUNT(*)
----------
4
SQL>          
    处理后数据库能正常打开、关闭、重启了。

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