>I need to eject it from the pool and designate a new master.
Did you eject it first from the Ui and then from the xencenter?
> But, I notice that I cannot make any storage changes to instances. (I assume because the master does not have access to the storage
Please try to fix the storage and then scan it.
What is the current situation is the host master is being seen in XenCenter or not?
Is the SR has any cross mark on XenCenter.
Can you try to fix the SR first if it is showing a cross mark over it.