很奇怪的一个问题！
ORACLE数据库服务器，系统启动之后，查看集群状态，发现CRS实例不可用，然后网上查找资料；
隔了几分钟之后，再次查询相关集群服务状态，发现正常了！！！
暂时得出的结论：操作系统启动之后，默认相关集群服务是自动启动的，但是，开机后，需要加载或者集群服务启动需要一段时间，等几分钟之后，集群服务才能准备 就绪！！！ 文末，有一篇其他情况的解决方式。
[root@oracle01 ~]# /u01/app/11.2.0.4/grid/bin/crsctl start crs
CRS-: Oracle High Availability Services is already active
CRS-: Command Start failed, or completed with errors.
[root@oracle01 ~]# su - grid
[grid@oracle01 ~]$
[grid@oracle01 ~]$
[grid@oracle01 ~]$
[grid@oracle01 ~]$
[grid@oracle01 ~]$ crs_stat -t -v
CRS-: Cannot communicate with the CRS daemon. [grid@oracle01 ~]$ crs_stat -t -v
Name Type R/RA F/FT Target State Host
----------------------------------------------------------------------
ora.BAK.dg ora....up.type / / ONLINE ONLINE oracle01
ora.DATA.dg ora....up.type / / ONLINE ONLINE oracle01
ora.FRA.dg ora....up.type / / ONLINE ONLINE oracle01
ora....ER.lsnr ora....er.type / / OFFLINE OFFLINE
ora....N1.lsnr ora....er.type / / ONLINE ONLINE oracle01
ora.OCRVOTE.dg ora....up.type / / ONLINE ONLINE oracle01
ora.asm ora.asm.type / / ONLINE ONLINE oracle01
ora.cvu ora.cvu.type / / ONLINE ONLINE oracle01
ora.ebjdb.db ora....se.type / / OFFLINE OFFLINE
ora....SM1.asm application / / ONLINE ONLINE oracle01
ora.....lsnr application / / OFFLINE OFFLINE
ora....e01.gsd application / / OFFLINE OFFLINE
ora....e01.ons application / / ONLINE ONLINE oracle01
ora....e01.vip ora....t1.type / / OFFLINE OFFLINE
ora....SM2.asm application / / ONLINE ONLINE oracle02
ora.....lsnr application / / OFFLINE OFFLINE
ora....e02.gsd application / / OFFLINE OFFLINE
ora....e02.ons application / / ONLINE ONLINE oracle02
ora....e02.vip ora....t1.type / / ONLINE ONLINE oracle02
ora.gsd ora.gsd.type / / OFFLINE OFFLINE
ora....network ora....rk.type / / ONLINE ONLINE oracle01
ora.oc4j ora.oc4j.type / / ONLINE ONLINE oracle01
ora.ons ora.ons.type / / ONLINE ONLINE oracle01
ora....ry.acfs ora....fs.type / / ONLINE ONLINE oracle01
ora.scan1.vip ora....ip.type / / ONLINE ONLINE oracle01
[grid@oracle01 ~]$
[grid@oracle01 ~]$
[grid@oracle01 ~]$
[grid@oracle01 ~]$ crs_stat -t -v
Name Type R/RA F/FT Target State Host
----------------------------------------------------------------------
ora.BAK.dg ora....up.type / / ONLINE ONLINE oracle01
ora.DATA.dg ora....up.type / / ONLINE ONLINE oracle01
ora.FRA.dg ora....up.type / / ONLINE ONLINE oracle01
ora....ER.lsnr ora....er.type / / OFFLINE OFFLINE
ora....N1.lsnr ora....er.type / / ONLINE ONLINE oracle01
ora.OCRVOTE.dg ora....up.type / / ONLINE ONLINE oracle01
ora.asm ora.asm.type / / ONLINE ONLINE oracle01
ora.cvu ora.cvu.type / / ONLINE ONLINE oracle01
ora.ebjdb.db ora....se.type / / OFFLINE OFFLINE
ora....SM1.asm application / / ONLINE ONLINE oracle01
ora.....lsnr application / / OFFLINE OFFLINE
ora....e01.gsd application / / OFFLINE OFFLINE
ora....e01.ons application / / ONLINE ONLINE oracle01
ora....e01.vip ora....t1.type / / OFFLINE OFFLINE
ora....SM2.asm application / / ONLINE ONLINE oracle02
ora.....lsnr application / / OFFLINE OFFLINE
ora....e02.gsd application / / OFFLINE OFFLINE
ora....e02.ons application / / ONLINE ONLINE oracle02
ora....e02.vip ora....t1.type / / ONLINE ONLINE oracle02
ora.gsd ora.gsd.type / / OFFLINE OFFLINE
ora....network ora....rk.type / / ONLINE ONLINE oracle01
ora.oc4j ora.oc4j.type / / ONLINE ONLINE oracle01
ora.ons ora.ons.type / / ONLINE ONLINE oracle01
ora....ry.acfs ora....fs.type / / ONLINE ONLINE oracle01
ora.scan1.vip ora....ip.type / / ONLINE ONLINE oracle01
其他情况的解决方式：http://www.codesec.net/view/493301.html