Oracle RAC ORACLE_SID的设置，报错（ORA-01078， LRM-00109）

[oracle@zen2 ~]$ echo $ORACLE_SID
ORAC
[oracle@zen2 ~]$ sqlplus /nolog

SQL*Plus: Release 10.2.0.5.0 - Production on Mon Dec 23 11:13:08 2013

Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.

SQL> exit
[oracle@zen2 ~]$ crs_stat -t
Name           Type           Target    State     Host
------------------------------------------------------------
ora....C1.inst application    ONLINE    ONLINE    zen1
ora....C2.inst application    ONLINE    ONLINE    zen2
ora.ORAC.db    application    ONLINE    ONLINE    zen2
ora....SM1.asm application    ONLINE    ONLINE    zen1
ora....N1.lsnr application    ONLINE    ONLINE    zen1
ora.zen1.gsd   application    ONLINE    ONLINE    zen1
ora.zen1.ons   application    ONLINE    ONLINE    zen1
ora.zen1.vip   application    ONLINE    ONLINE    zen1
ora....SM2.asm application    ONLINE    ONLINE    zen2
ora....N2.lsnr application    ONLINE    ONLINE    zen2
ora.zen2.gsd   application    ONLINE    ONLINE    zen2
ora.zen2.ons   application    ONLINE    ONLINE    zen2
ora.zen2.vip   application    ONLINE    ONLINE    zen2
[oracle@zen2 ~]$ sqlplus /nolog

SQL*Plus: Release 10.2.0.5.0 - Production on Mon Dec 23 11:14:16 2013

Copyright (c) 1982, 2010, Oracle.  All Rights Reserved.

SQL> conn /as sysdba
Connected to an idle instance.
SQL> show parameters sga
ORA-01034: ORACLE not available

数据库明明是启动的啊，于是继续查看

SQL> show user
USER is "SYS"
SQL> startup
ORA-01078: failure in processing system parameters
LRM-00109: could not open parameter file '/u01/oracle/product/db_1/dbs/initORAC.ora'
SQL> exit
Disconnected
[oracle@zen2 ~]$ cd /u01/oracle/product/db_1/dbs/
[oracle@zen2 dbs]$ ll
total 52
-rw-rw---- 1 oracle oinstall  1477 Dec 23 09:07 ab_+ASM2.dat
-rw-rw---- 1 oracle oinstall  1544 Dec 23 09:11 hc_+ASM2.dat
-rw-rw---- 1 oracle oinstall  1544 Dec 23 09:11 hc_ORAC2.dat
lrwxrwxrwx 1 oracle oinstall    37 Dec 20 17:42 init+ASM2.ora -> /u01/oracle/admin/+ASM/pfile/init.ora
-rw-r--r-- 1 oracle oinstall 12920 May  3  2001 initdw.ora
-rw-r----- 1 oracle oinstall  8385 Sep 11  1998 init.ora
-rw-r----- 1 oracle oinstall    34 Dec 20 18:42 initORAC2.ora
-rw-r----- 1 oracle oinstall  1536 Dec 20 17:42 orapw+ASM2
-rw-r----- 1 oracle oinstall  1536 Dec 20 18:36 orapwORAC2
[oracle@zen2 dbs]$ cat initORAC2.ora
SPFILE='+ZEN/ORAC/spfileORAC.ora'

google了一下，原文 https://community.oracle.com/thread/2330291?start=0&tstart=0

一个类似的问题之后修改了一下配置文件中的ORACLE_SID=ORAC2

重新登录，问题解决。