I was trying to investigate a failed disk from a RAID array using a USB hard drive dock and Windows 7. The problem was Windows was reporting that the disk was read-only, so it wouldn’t repartition the hard disk.

I opened up diskpart tool in windows (Run As Administrator) and tried to run the clean command, but again it complained that the hard drive was in read-only mode.

Finally, I found the way to remove the read-only flag, so I could wipe the drive, and scan it for bad sectors.

<br /> DISKPART> list disk<br /> DISKPART> select disk 2<br /> DISKPART> list part<br /> DISKPART> select part 2<br /> DISKPART> attrib part clear readonly<br />