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I just installed a 250 GB m.2 SSD as a Windows 10 boot drive on an Acer Aspire E15. The computer previously had Windows 10 installed on a 1 TB HDD.

This is what my current configuration looks like:

enter image description here

Disk 1 is the SSD boot drive running Windows 10. Currently, the EFI System Partition appears to be listed as a boot drive during restarts, which is a problem. How can I format Disk 0 (the old 1TB HDD) so that the drive contains a single partition with no strings attached?

I have tried the following DISKPART commands with no success (See errors below). 

DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
* Disk 0    Online          931 GB  1041 MB        *
  Disk 1    Online          232 GB      0 B        *

DISKPART> delete disk override

The disk you specified cannot be deleted.
Please select an empty missing disk to delete.

DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
* Disk 0    Online          931 GB  1041 MB        *
  Disk 1    Online          232 GB      0 B        *

DISKPART> clean

Virtual Disk Service error:
Clean is not allowed on the disk containing the current boot,
system, pagefile, crashdump or hibernation volume.
Borealis
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1 Answers1

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You still have partitions on the disk, delete these first then try delete disk

You also need to 'select' the disk, before trying to delete anything.

list disk

select disk 1

list partition

select partition 1

delete partition

.... and so on.

djsmiley2kStaysInside
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