xe-edit-bootloader -n Aloysius-New -p 1
The VDI is currently in use by VBD:
dee58ea0-41d9-6332-f025-e2bc8e9c1118
The associated VM is:
96bc5435-f016-4694-bff1-b198155cbbdf

uuid ( RO)           : 96bc5435-f016-4694-bff1-b198155cbbdf
     name-label ( RW): Control domain on host: xenserver-ggcfxtvv
    power-state ( RO): running


Please shut down any running VMs which are currently using the disk.