Oracle12c 裡votedisk不能單獨的進行備份了，它的備份和ocr的備份放在了一起，用ocrconfig –showbackup可以看到當前存在的備份，下面模擬所有votedisk全部損壞的情況下如何恢復votedisk，若要在ocr和votedisk全部損壞的情況下恢復可以參照MOS 1383888.1-How to start CRS stack when having missing disks from diskgroup storing voting disk：

損壞前的狀態：

grid@ora12c2:/home/grid>crsctl query css votedisk

## STATE File Universal Id File Name Disk group

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

1. ONLINE 1ad25b7075e74f15bf49a25f7a5303bb (/dev/asm-diskk) [DATADG2]

2. ONLINE d99e5f80de344f4dbfc28f80352a4c5f (/dev/asm-diskl) [DATADG2]

3. ONLINE f188b70c561f4f4dbf0ab2ce30e741d9 (/dev/asm-diskm) [DATADG2]

Located 3 voting disk(s).

破壞votedisk：

root@ora12c2:/root>dd if=/dev/zero of=/dev/asm-diskk bs=1M count=200

200+0 records in

200+0 records out

209715200 bytes (210 MB) copied, 2.35354 s, 89.1 MB/s

root@ora12c2:/root>dd if=/dev/zero of=/dev/asm-diskl bs=1M count=200

200+0 records in

200+0 records out

209715200 bytes (210 MB) copied, 2.60946 s, 80.4 MB/s

root@ora12c2:/root>dd if=/dev/zero of=/dev/asm-diskm bs=1M count=200

200+0 records in

200+0 records out

209715200 bytes (210 MB) copied, 2.54389 s, 82.4 MB/s

連線入ASM instance，修改asm_diskgroups中去掉已經損壞的datadg2，否則後面crsctl start crs會啟動不了：

SQL> show parameter diskgroup

NAME TYPE VALUE

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

asm_diskgroups string DATADG1, DATADG2

SQL> alter system set asm_diskgroups=DATADG1;

System altered.

以exclusive方式重新啟動crs，改啟動方式不啟動votedisk

root@ora12c2:/root>crsctl stop crs

root@ora12c2:/root>crsctl start crs -excl

CRS-4123: Oracle High Availability Services has been started.

CRS-2673: Attempting to stop 'ora.drivers.acfs' on 'ora12c2'

CRS-2677: Stop of 'ora.drivers.acfs' on 'ora12c2' succeeded

CRS-2672: Attempting to start 'ora.evmd' on 'ora12c2'

CRS-2672: Attempting to start 'ora.mdnsd' on 'ora12c2'

CRS-2676: Start of 'ora.mdnsd' on 'ora12c2' succeeded

CRS-2676: Start of 'ora.evmd' on 'ora12c2' succeeded

CRS-2672: Attempting to start 'ora.gpnpd' on 'ora12c2'

CRS-2676: Start of 'ora.gpnpd' on 'ora12c2' succeeded

CRS-2672: Attempting to start 'ora.cssdmonitor' on 'ora12c2'

CRS-2672: Attempting to start 'ora.gipcd' on 'ora12c2'

CRS-2676: Start of 'ora.cssdmonitor' on 'ora12c2' succeeded

CRS-2676: Start of 'ora.gipcd' on 'ora12c2' succeeded

CRS-2672: Attempting to start 'ora.cssd' on 'ora12c2'

CRS-2672: Attempting to start 'ora.diskmon' on 'ora12c2'

CRS-2676: Start of 'ora.diskmon' on 'ora12c2' succeeded

CRS-2676: Start of 'ora.cssd' on 'ora12c2' succeeded

CRS-2672: Attempting to start 'ora.ctssd' on 'ora12c2'

CRS-2672: Attempting to start 'ora.drivers.acfs' on 'ora12c2'

CRS-2672: Attempting to start 'ora.cluster_interconnect.haip' on 'ora12c2'

CRS-2676: Start of 'ora.drivers.acfs' on 'ora12c2' succeeded

CRS-2676: Start of 'ora.ctssd' on 'ora12c2' succeeded

CRS-2676: Start of 'ora.cluster_interconnect.haip' on 'ora12c2' succeeded

CRS-2672: Attempting to start 'ora.asm' on 'ora12c2'

CRS-2676: Start of 'ora.asm' on 'ora12c2' succeeded

CRS-2672: Attempting to start 'ora.storage' on 'ora12c2'

CRS-2676: Start of 'ora.storage' on 'ora12c2' succeeded

CRS-2672: Attempting to start 'ora.crsd' on 'ora12c2'

CRS-2676: Start of 'ora.crsd' on 'ora12c2' succeeded

grid@ora12c2:/home/grid>crsctl status res -init -t

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

Name Target State Server State details

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

Cluster Resources

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

ora.asm