During a Reboot of a VM at some unavoidable circumstances, the Startup logs might end up with “VDI not available” error. Follow the below steps to fix this:
Determine the UUID of the Storage Repository and the VDI that’s exhibiting the issue (we can either get this from xencenter or by using xe sr-list name-lable= ”name of the SR” and xe vdi-list sr-uuid = ”UUID obtained from the previous command”)
Run xe vdi-forget uuid = <vdi_uuid>
Now you could not see the Disk in the corresponding SR.
Make a “Scan” again and you will see the VDI sitting on the SR.
Reattach the VDI to your VM of choice and the VM will bootup fine.
Finally we fixed VDI not available error in XenServer.
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Here is a related post you maybe interested in: How to Change the Pool Master in Citrix Xenserver
Also check –Troubleshooting ESXi hosts
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