While configuring a new MSCS Cluster in VMware ESXi 5.1 I encountered the following error when running the Cluster Validation Tool:
The wrong diskette is in the drive Insert %2 (Volume Serial Number: %3) into drive %1.
I was very surprised to see an error indicating that the problem was with a diskette. Obviously this wasn’t right, my suspicion was that it was storage related so I requested a SAN Engineer to take a closer look. The cursory checks were made such as ensuring PR (Persistent Reservations) was set on the LUN but no glaringly obvious causes were identified.
After trying a few things (and failing) I ‘cleaned’ the clustered disks, which fixed the problem. This involved converting the disks from GPT to MBR and then back again. The following steps were performed:
- Open Disk Management by running diskmgmt.msc from a command prompt
- The disk contained a volume, so right-clicked on the volume (within the disk) and then clicked Delete Volume.
- Right-clicked the GPT disk and then clicked Convert to MBR disk.
- Once the disk had converted to MBR I right-clicked on it and then clicked Convert to GPT disk.
I then re-ran the Cluster Validation Test and it passed successfully!