spfile? string? ? ? +DATA/sicsstb/spfilesicsstb.ora
SQL> show parameter control
NAME? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? TYPE? ? ? ? VALUE
------------------------------------ ----------- ------------------------------
control_file_record_keep_time? ? ? ? integer? ? 7
control_files? ? ? ? ? ? ? ? ? ? ? ? string? ? ? +DATA/sicsstb/controlfile/curr
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ent.260.878897845, +RECO/sicsstb/controlfile/current.256.878
? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 897845
control_management_pack_access? ? ? string? ? ? DIAGNOSTIC+TUNING
注意：此处的ASM无法启动，并不是笔者没有启动ASM组件。如果是简单因为ASM组件没有开启，先启动数据库服务的话，错误信息如下：
[oracle@NCR-Standby-Asm ~]$ sqlplus /nolog
SQL*Plus: Release 11.2.0.4.0 Production on Mon Jun 1 08:39:11 2015
Copyright (c) 1982, 2013, Oracle.? All rights reserved.
SQL> conn / as sysdba
Connected to an idle instance.
SQL> startup
ORA-01078: failure in processing system parameters
ORA-01565: error in identifying file '+DATA/sicsstb/spfilesicsstb.ora'
ORA-17503: ksfdopn:10 Failed to open file +DATA/sicsstb/spfilesicsstb.ora
ORA-15077: could not locate ASM instance serving a required diskgroup
nomount阶段要访问spfile，我们的SPFILE是在+DATA里面，如果ASM真的不可用的话，连nomount阶段都不能进入。
[root@NCR-Standby-Asm ~]# rpm -qa | grep asm
libatasmart-0.17-4.el6_2.x86_64
oracleasmlib-2.0.4-1.el6.x86_64
oracleasm-support-2.1.8-1.el6.x86_64
kmod-oracleasm-2.0.6.rh1-3.el6_5.x86_64
查找对应生成的trace文件，可以看到问题的更详细描述。
[root@NCR-Standby-Asm trace]# tail -n 200 sicsstb_rbal_4147.trc
Trace file /u02/app/oracle/diag/rdbms/sicsstb/sicsstb/trace/sicsstb_rbal_4147.trc
Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - 64bit Production
With the Partitioning, Automatic Storage Management, OLAP, Data Mining
and Real Application Testing options
ORACLE_HOME = /u02/app/oracle/product/11.2.0/dbhome_1
System name:? ? Linux
Node name:? ? ? NCR-Standby-Asm
Release:? ? ? ? 2.6.32-431.el6.x86_64
Version:? ? ? ? #1 SMP Sun Nov 10 22:19:54 EST 2013
Machine:? ? ? ? x86_64
VM name:? ? ? ? VMWare Version: 6
Instance name: sicsstb
Redo thread mounted by this instance: 0
Oracle process number: 15
*** 2015-05-25 16:09:31.634
*** SESSION ID:(190.1) 2015-05-25 16:09:31.634
*** CLIENT ID:() 2015-05-25 16:09:31.634
*** SERVICE NAME:() 2015-05-25 16:09:31.634
*** MODULE NAME:() 2015-05-25 16:09:31.634
*** ACTION NAME:() 2015-05-25 16:09:31.634
ERROR: asm_version error. err: driver/agent not installed rc:2
ORA-15183: ASMLIB initialization error [driver/agent not installed]
ORA-15183: ASMLIB initialization error [driver/agent not installed]
ERROR: asm_version error. err: driver/agent not installed rc:2
ORA-15183: ASMLIB initialization error [driver/agent not installed]
ORA-15183: ASMLIB initialization error [driver/agent not installed]
ERROR: asm_version error. err: driver/agent not installed rc:2
ORA-15183: ASMLIB initialization error [driver/agent not installed]
ORA-15183: ASMLIB initialization error [driver/agent not installed]
ERROR: asm_version error. err: driver/agent not installed rc:2
ORA-15183: ASMLIB initialization error [driver/agent not installed]
ORA-15183: ASMLIB initialization error [driver/agent not installed]
ERROR: asm_version error. err: driver/agent not installed rc:2
ORA-15183: ASMLIB initialization error [driver/agent not installed]
ORA-15183: ASMLIB initialization error [driver/agent not installed]
Incident 9721 created, dump file: /u02/app/oracle/diag