cannot mount database in EXCLUSIVE mode

1.故障發現
Oracle 啟動後發現其他帳戶都無法登陸，報告錯誤如下：
ERROR:
ORA-01034: ORACLE not available
ORA-27101: shared memory realm does not exist
Linux Error: 2: No such file or directory
登入伺服器
Sqlplus /nolog
Connect / as sysdba
Startup
出現故障如下：
SQL> startup
ORACLE instance started.
 
Total System Global Area 1224736768 bytes
Fixed Size                   778876 bytes
Variable Size             652483972 bytes
Database Buffers          570425344 bytes
Redo Buffers                1048576 bytes
ORA-01102: cannot mount database in EXCLUSIVE mode
大意是 “Oracle被異常關閉時，有資源沒有被釋放……”

檢查警告日誌，也證實了這一點，系統異常
解決：
察看報警日至檔案：錯誤如下：
LTER DATABASE   MOUNT
Mon Apr 12 13:57:29 2010
scumnt: failed to lock /data/oracle/product/10.1.0/db_1/dbs/lkMUSICDB1 exclusive
Mon Apr 12 13:57:29 2010
ORA-09968: scumnt: unable to lock file
Linux Error: 11: Resource temporarily unavailable
Additional information: 1728
Mon Apr 12 13:57:29 2010
ORA-1102 signalled during: ALTER DATABASE   MOUNT...
2。解決方法
察看此目錄
Cd $ORACLE_HOME/dbs
發現此目錄下有 lk(SID) 檔案存在
/sbin/fuser -u lkMUSICDB1
lkMUSICDB1:           1724(oracle)  1726(oracle)  1728(oracle)  1730(oracle)  1732(oracle)  1736(oracle)  1738(oracle)  1741(oracle)  1840(oracle)  1968(oracle)  1970(oracle)  1995(oracle)  1997(oracle)  2910(oracle)  2912(oracle)  2914(oracle)  2916(oracle)  2918(oracle)  3198(oracle)  3263(oracle)
殺掉先
/sbin/fuser -k lkMUSICDB1
再查，發現已經沒有資源佔用
/sbin/fuser -u lkMUSICDB1
ok！
再次啟動Oracle
SQL> connect / as sysdba
Connected to an idle instance.
SQL> startup
ORACLE instance started.
 
Total System Global Area 1224736768 bytes
Fixed Size                   778876 bytes
Variable Size             652483972 bytes
Database Buffers          570425344 bytes
Redo Buffers                1048576 bytes
Database mounted.
Database opened.