I have an Hyper-V VM (generation 1). The VM is running but I need to add a new disk (a .VHD image). I don't want to stop this machine and I would do this while it is still running, but IDE Controller's Add button is disabled. So i only can add SCSI controller; I do and everythng seems OK, but when I connect to the guest VM, I can't see that SCSI disk. Why? What is wrong with this?
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Once you have add the new SCSI disk, login in to the VM and then use disk management to do a rescan and the new SCSI disk should appear. you can access disk management through Server Manager.
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Michael Brown
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