Testing the disks using vxfentsthdw utility


Testing the disks using vxfentsthdw utility
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This procedure uses the /dev/sdx disk in the steps.

If the utility does not show a message that states a disk is ready, the verification has failed. Failure of verification can be the result of an improperly configured disk array. The failure can also be due to a bad disk.

If the failure is due to a bad disk, remove and replace it. The vxfentsthdw utility indicates a disk can be used for I/O fencing with a message resembling:

The disk /dev/sdx is ready to be configured for I/O Fencing on 
node sys1

For more information on how to replace coordinator disks, refer to the Cluster Server Administrator's Guide.

To test the disks using vxfentsthdw utility

Make sure system-to-system communication functions properly.
From one node, start the utility.
The script warns that the tests overwrite data on the disks. After you review the overview and the warning, confirm to continue the process and enter the node names.

Warning:

The tests overwrite and destroy data on the disks unless you use the -r option.
```
******** WARNING!!!!!!!! ********
THIS UTILITY WILL DESTROY THE DATA ON THE DISK!!

Do you still want to continue : [y/n] (default: n) y
Enter the first node of the cluster: sys1
Enter the second node of the cluster: sys2
```
Review the output as the utility performs the checks and reports its activities.

If a disk is ready for I/O fencing on each node, the utility reports success for each node. For example, the utility displays the following message for the node sys1.

The disk is now ready to be configured for I/O Fencing on node 
sys1

ALL tests on the disk /dev/sdx have PASSED
The disk is now ready to be configured for I/O fencing on node 
sys1

Run the vxfentsthdw utility for each disk you intend to verify.

Note:

Only dmp disk devices can be used as coordinator disks.

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