I have an external HD which used to be my TimeMachine drive. I got a different drive for that, so I want the original drive back as an external on my Windows box, but it has this random 200 MB partition labeled as EFI System Partition. How do I get rid of this?
- On the command prompt type diskpart and answer to any possible UAC prompt.
- On the new diskpart prompt, type list disk. Note the Disk ### column.
- Type, select disk ### (with
being the disk you wish to delete. Usually the disk with partition 0 with a size of 200 MB)NOTE: The disk may not show the 200MB partition in the disk list in Diskpart even if it exists.
- Finish by typing, clean.
- Type exit to exit diskpart
Use DBAN to nuke all partitions on the drive (version 2 supports USB) and then create a new partition using Windows Disk Management.
If necessary, backup important data, as everything will be deleted.