一直对这个配置比较混乱，我看文档上写推荐都是300m，我选的是externalmos，三个磁盘组成磁盘组，但我看他只在raw1 上啊，那我其他两个是怎么个工作原理啊，还请教正确的配置方法和大小设置，我的ocr和votingdisk状态如下：

[grid@cipa-rac2 ~]$ crsctl query css votedisk

## STATE File Universal Id File Name Disk group

-- ----- ----------------- --------- ---------

1. ONLINE 2c92c014b3e74f62bf1f3e21516c7a49 (/dev/raw/raw1) [OCR]

Located 1 voting disk(s).

[grid@cipa-rac2 ~]$

[grid@cipa-rac2 ~]$ crsctl query css votedisk

## STATE File Universal Id File Name Disk group

-- ----- ----------------- --------- ---------

1. ONLINE 2c92c014b3e74f62bf1f3e21516c7a49 (/dev/raw/raw1) [OCR]

Located 1 voting disk(s).

[grid@cipa-rac2 ~]$ ocrconfig -showbackup

cipa-rac1 2015/05/29 10:12:19 /opt/app/11.2.0/grid/cdata/cipa-rac/backup00.ocr

cipa-rac1 2015/05/29 06:12:18 /opt/app/11.2.0/grid/cdata/cipa-rac/backup01.ocr

cipa-rac1 2015/05/29 02:12:17 /opt/app/11.2.0/grid/cdata/cipa-rac/backup02.ocr

cipa-rac1 2015/05/28 02:12:00 /opt/app/11.2.0/grid/cdata/cipa-rac/day.ocr

cipa-rac1 2015/05/19 02:04:32 /opt/app/11.2.0/grid/cdata/cipa-rac/week.ocr

PROT-25: Manual backups for the Oracle Cluster Registry are not available

[grid@cipa-rac2 ~]$ ocrcheck

Status of Oracle Cluster Registry is as follows :

Version : 3

Total space (kbytes) : 262120

Used space (kbytes) : 3160

Available space (kbytes) : 258960

ID : 1228808456

Device/File Name : +OCR

Device/File integrity check succeeded

Device/File not configured

Device/File not configured

Device/File not configured

Device/File not configured

Cluster registry integrity check succeeded

Logical corruption check bypassed due to non-privileged user