Clear Read-Only flag on Disk in Windows 7 using Diskpart


Hans-Henry Jakobsen4 years ago34 comments, 
This is a short HOWTO clear the read-only/readonly flag/attribute on a disk in Windows 7 using the diskpart command from a Windows Command Prompt.
Warning!
Be sure to do this on the right disk since the diskpart command can do serious damage if you run it on the wrong disk.
  1. Open a command window by running the diskpart command from a Command Prompt
  2. Determine which disk you are going to modify:
  3. DISKPART> list disk

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
  Disk 0    Online          149 GB  1024 KB
  Disk 1    Online          465 GB   465 GB
  4. Select the disk you are going to modify
    DISKPART> select disk 1
    You have now selected disk 1
    list disk

  Disk ###  Status         Size     Free     Dyn  Gpt
  --------  -------------  -------  -------  ---  ---
  Disk 0    Online          149 GB  1024 KB
* Disk 1    Online          465 GB   465 GB
  5. Clear the Read-Only attribute on the selected disk
    DISKPART> attributes disk clear readonly
The disk is no longe Read-Only protected.
If you would like to set the disk Read-Only again just do the same procedure and write
DISKPART> attributes disk set readonly
in the last operation.
When you are done modifying the disk attributes just issue the exit command
DISKPART> exit

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