Make move_disk work on bare metal

[Googulator]

• Use -S32 -H64 --force to trick sfdisk into allowing MiB-aligned partitions on a drive that reports a CHS geometry
• Explicitly create partition at sector 2097152 (=1GiB)
• Force mkfs.ext4 to overwrite any existing filesystem it might find
• Wait up to 2 minutes for the disk to become readable (especially USB drives often show up with a delay)

Depends on #390