來自Metalink .

Voting Disk

Note from Metalink: When the CRS stack is running and the add votedisk command or the crsctl remove votedisk command is executed, It will fail with a "Cluster is not in a ready state for online disk addition" message. This is because of internal bug 3972986. Dynamic addition and deletion of voting disk when the Clusterware is running is not possible without the fix for this bug.

Shutdown the Oracle Clusterware (crsctl stop crs as root) on all nodes before making any modification to the voting disk.

1. get the voting disk location:
crsctl query css votedisk

2. Backing up Voting Disks:
dd if=voting_disk_name f=backup_file_name

3. Recovering Voting Disks:
dd if=backup_file_name f=voting_disk_name

4. add a voting disk:
as oracle user:
srvctl stop nodeapps -n linux1
srvctl stop nodeapps -n linux2
crs_stat -t

as root user:
crsctl stop crs
crsctl check crs
crsctl add css votedisk $path -force
crsctl query css votedisk
crsctl start crs
crs_stat -t

5. remove a voting disk as root user:
as oracle user:
srvctl stop nodeapps -n linux1
srvctl stop nodeapps -n linux2
crs_stat -t

as root user:
crsctl stop crs
crsctl check crs
crsctl delete css votedisk $path -force
crsctl query css votedisk
crsctl start crs
crs_stat -t

6. move a Voting Disk:
as oracle user:
srvctl stop nodeapps -n linux1
srvctl stop nodeapps -n linux2
crs_stat -t

as root user:
crsctl stop crs
crsctl check crs
crsctl delete css votedisk –force
crsctl add css votedisk –force
crsctl start crs
crsctl query css votedisk

Example moving Voting Disk from OCFS to raw devices
The voting disk is a partition that Oracle Clusterware uses to verify cluster node membership and status.

The voting disk must be owned by the oracle user, must be in the dba group, and must have permissions set to 644. Provide at least 20 MB disk space for the voting disk.

In this example the Voting Disks are located in the ocfs2 file system:
/ocfs2/voting1, /ocfs2/voting2, /ocfs2/voting3

Create raw device files of at least 20 MB. In this example the new voting disks will be on the following devices:
/dev/raw/raw3, /dev/raw/raw4, /dev/raw/raw5

Once the raw devices are created, use the dd command to zero out the device and make sure no data is written to the raw devices:

        dd if=/dev/zero   f=/dev/raw/raw3
        dd if=/dev/zero   f=/dev/raw/raw4
        dd if=/dev/zero   f=/dev/raw/raw5

Now you are ready to move/replace the voting disks to the new storage location.

To move a Voting Disk to new storage location:

        crsctl delete css votedisk /ocfs2/voting1 –force
        crsctl add css votedisk /dev/raw/raw3 –force
        crsctl delete css votedisk /ocfs2/voting2 –force
        crsctl add css votedisk /dev/raw/raw4 –force
        crsctl delete css votedisk /ocfs2/voting3 –force
        crsctl add css votedisk /dev/raw/raw5 –force

Example of adding Voting Disks
If you have upgraded your environment from a previous version, where you only had one voting disk, you can use the following steps to add additional voting disk.

In this example 2 additional Voting Disks are added:

crsctl add css votedisk /dev/raw/raw4 –force
crsctl add css votedisk /dev/raw/raw5 –force

After modifying the voting disk, start the Oracle Clusterware stack on all nodes

crsctl start crs

Voting Disk - Oracle10g

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