102400+0 records in 102400记录输入
102400+0 records out 102400记录输出
104857600 bytes (105 MB) copied, 76.7348 seconds, 1.4 MB/s
命令解释
dd： 指定大小的块拷贝一个文件，并在拷贝的同时进行指定的转换
if=/dev/zero 指定源文件，0设备
of=/dev/raw/raw1 指定目标文件，OCR磁盘
bs=1024 指定块大小1024个字节，即1k
count=102400 指定拷贝的块数，102400个块
5.再次检查OCR磁盘状态
[root@rac2 sysconfig]# ocrcheck
PROT-601: Failed to initialize ocrcheck 初始化OCR磁盘失败
检查CRS状态
[root@rac2 sysconfig]# crsctl check crs
Failure 1 contacting CSS daemon 连接CSS守护进程失败
Cannot communicate with CRS 无法与CRS通信
EVM appears healthy
CRS进程失败很正常，你想想连记录的资源信息都丢失了，还怎么管理呢
6.使用import恢复OCR磁盘内容
[root@rac2 crs1020]# ocrconfig -import /home/oracle/ocr.exp
7.最后检查OCR磁盘状态
谢天谢地顺顺利利恢复回来了
[root@rac2 crs1020]# ocrcheck
Status of Oracle Cluster Registry is as follows :
Version : 2
Total space (kbytes) : 104344
Used space (kbytes) : 4348
Available space (kbytes) : 99996
ID : 425383787
Device/File Name : /dev/raw/raw1
Device/File integrity check succeeded
Device/File not configured
Cluster registry integrity check succeeded
8.关注CRS守护进程
[root@rac2 crs1020]# crsctl check crs
CSS appears healthy
CRS appears healthy
EVM appears healthy
非常好，当OCR磁盘恢复之后自动重启CRS守护进程
[root@rac2 crs1020]# crs_stat -t
Name Type Target State Host
------------------------------------------------------------
ora....B1.inst application ONLINE ONLINE rac1
ora....B2.inst application ONLINE OFFLINE
ora....DB1.srv application ONLINE ONLINE rac1
ora.....TAF.cs application ONLINE ONLINE rac1
ora.RACDB.db application ONLINE ONLINE rac1
ora....SM1.asm application ONLINE ONLINE rac1
ora....C1.lsnr application ONLINE ONLINE rac1
ora.rac1.gsd application ONLINE ONLINE rac1
ora.rac1.ons application ONLINE ONLINE rac1
ora.rac1.vip application ONLINE ONLINE rac1
ora....SM2.asm application ONLINE OFFLINE
ora....C2.lsnr application ONLINE OFFLINE
ora.rac2.gsd application ONLINE OFFLINE
ora.rac2.ons application ONLINE OFFLINE
ora.rac2.vip application ONLINE ONLINE rac2
我重启了一遍CRS集群服务
[root@rac2 init.d]# ./init.crs stop
Shutting down Oracle Cluster Ready Services (CRS):
Stopping resources.
Successfully stopped CRS resources
Stopping CSSD.
Shutting down CSS daemon.
Shutdown request successfully issued.
Shutdown has begun. The daemons should exit soon.
[root@rac2 init.d]# crs_stat -t
CRS-0184: Cannot communicate with the CRS daemon.
[root@rac2 init.d]# ./init.crs start
Startup will be queued to init within 90 seconds.
现在都恢复了
[oracle@rac2 ~]$ crs_stat -t
Name Type Target State Host
----------------------------------------------------------------------------------------------
ora....B1.inst application ONLINE ONLINE rac1
ora....B2.inst application ONLINE ONLINE rac2
ora....DB1.srv application ONLINE ONLINE rac2
ora.....TAF.cs application ONLINE ONLINE rac2
ora.RACDB.db application ONLINE ONLINE rac2
ora....SM1.asm application ONLINE ONLINE rac1
ora....C1.lsnr application ONLINE ONLINE rac1
ora.rac1.gsd application ONLINE ONLINE rac1
ora.rac1.ons application ONLINE ONLINE rac1
ora.rac1.vip application ONLINE ONLINE rac1
ora....SM2.asm application ONLINE ONLINE rac2
ora....C2.lsnr application ONLINE ONLINE rac2
ora.rac2.gsd application ONLINE ONLINE rac2
ora.rac2.ons application ONLINE ONLINE rac2
ora.rac2.vip application ONLINE ONLINE rac2
四 模拟votedisk不可用时，RAC会出现什么现象 给出故障定位