Remove hidden partitions from a disk

To remove all partitions from a disk from Windows 7 shell (like Mac OS EFI System partition):

 

   1. On the command prompt type diskpart and answer to any possible UAC prompt.

   2. On the new diskpart prompt, type list disk. Note the Disk ### column.

   3. Type, select disk ### (with ### being the partition you wish to delete. Usually partition 0 and wth those 200 MB of size)

   4. Finish by typing, clean.

 

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Stefano Mazgon