VDI not Available Error on Xenserver

I forcefully shut down a VM and then I was trying to start it but it gave an error “VDI not available”.

I tried creating a new VM and attaching the same HDD but same error popped up.

Solution:

1. Open the console of Master Xenserver Host

2. Determine the UUID of the Storage Repository and the VDI that’s exhibiting the issue

# xe vdi-list name-description=erpweb

This above command gave me the details of UUID for VDI that was giving problem after scrolling the list.

3. Run xe vdi-forget uuid=<vdi_uuid>

4. Rescan the SR Storage and I got the VDI listed, it was showing no name. In the properties I added its old name and Description


5. After attaching it to a new VM, it started working.