erpdb1$[/home/oracle]crsctl query css votedisk
 0.     0    /dev/jcerp_vote_disk3
 1.     0    /dev/jcerp_vote_disk1
 2.     0    /dev/jcerp_vote_disk2

located 3 votedisk(s).

备份votedisk: dd if=/dev/raw/votediskcopied of=/dev/raw/raw1
恢复votedisk: dd if=/dev/raw/raw1 of=/dev/raw/votediskcopied

查看ocrs的信息：
erpdb1$[/home/oracle]ocrcheck
Status of Oracle Cluster Registry is as follows :
         Version                  :          2
         Total space (kbytes)     :     261916
         Used space (kbytes)      :       4368
         Available space (kbytes) :     257548
         ID                       : 1501608293
         Device/File Name         : /dev/jcerp_ocr_disk1
                                    Device/File integrity check succeeded
         Device/File Name         : /dev/jcerp_ocr_disk2
                                    Device/File integrity check succeeded

         Cluster registry integrity check succeeded

导出导入
可以用raw的命令来备份和恢复，不过ocrconfig提供了专门的命令来导出和导入还提供了镜像的方法

OCR手动导出:ocrconfig -export /tmp/ocr_bak
OCR手动导入:ocrconfig -import /tmp/ocr_bak
恢复OCR ocrconfig -restore /opt/product/10.2.0.1/crs/cdata/crs/backup01.ocr
添加OCR镜像盘:

创建用于镜像OCR的RAW设备,比如为:/dev/raw/ocrcopied
用ocrconfig –export 导出OCR的信息
编辑/etc/oracle/ocr.loc文件,添加ocrmirrorconfig_loc行
$ cat ocr.loc
ocrconfig_loc=/dev/raw/raw2
ocrmirrorconfig_loc=/dev/raw/ocrcopied
local_only=FALSE
用ocrconfig –import 导入OCR的信息