Error Message

Checking the Mount_A.log at %VCS_HOME%/logs, it would report the below error

Mount::online:Invalid disk (xxxxxxx) or partition(x) number specified. Error : 18

The error is observed when the Properties of the LUN change at the SAN level, which causes the disk signature to change.

As a result, the existing values for disk signature and partition number in the Mount resource become void and need to be updated with the latest values. 

1) On the node where the error is observed, run the "HAVOL" utility (The utility is available at \Program Files\VERITAS\Cluster Server\Bin )

2) Run the command havol -getdrive which will create a file as driveinfo.txt on the local user profile.

Below is the expected output on running the tool

3) Make a note of the Disk Signature and Partition number for the Disk which is faulting.

Sample output

4) Open the Mount Resource properties and cross check the Disk Signature and Partition Number.

5) Modify the Disk Signature and Partition number to match with driveinfo.txt and probe the resource.

6) The Mount resource should now be able to online.