ASM RAC 11.2: Why Voting Disk Are Not Listed Thru ASMCMD or SQL*Plus?, And How To Backup Voting Disk In ASM 11.2?

ASM RAC 11.2: Why Voting Disk Are Not Listed Thru ASMCMD or SQL*Plus?, And How To Backup Voting Disk In ASM 11.2?

QUESTION 1
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ASM RAC 11.2: Why Voting Disk Are Not Listed Thru ASMCMD or SQL*Plus?


QUESTION 2
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How To Backup Voting Disk In ASM 11.2?

Solution:

ANSWER 1
=========

1) Voting disks are managed using the crsctl utility. The voting disk stored in ASM only can be listed using the next command:

Example:

[oracle@dmorldb01 ~]$ crsctl query css votedisk
## STATE File Universal Id File Name Disk group
-- ----- ----------------- --------- ---------
1. ONLINE 8a54aa86162f4f09bf0c6c6322b7e917 (o/192.168.10.7/SYSTEMDG_CD_05_dmorlcel03) [SYSTEMDG]
2. ONLINE 105e59f3f1934f6fbf72c75642c5420c (o/192.168.10.5/RECO_CD_03_dmorlcel01) [SYSTEMDG]
3. ONLINE 5a07afc43b4e4f49bf9bfbebc72de578 (o/192.168.10.6/SYSTEMDG_CD_04_dmorlcel02) [SYSTEMDG]

2) Voting disks cannot be listed or displayed thru ASMCMD or SQL*Plus since they are not regular ASM files. Voting disks are managed using the crsctl utility. Clusterware knows the location of the voting disk in case ASM is unavailable.

ANSWER 2
=========

1) In previous releases, backing up the voting disks using a dd command was a required post installation task. With Oracle Clusterware 11g Release 2, backing up and restoring a voting disk using the dd command may result in the loss of the voting disk, so this procedure is not supported.

2) Backing up voting disks manually is no longer required because voting disk data is backed up automatically in the OCR as part of any configuration change and voting disk data is automatically restored to any added voting disks.

3) The next note shows a clear example about how to restore the OCR & Votedisk on release 11.2:

=)> How to restore ASM based OCR after complete loss of the CRS diskgroup on Linux/Unix systems Document 1062983.1



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