The device, \Device\Harddisk0\DR0, has a bad block

Windows showed many bad block errors and I couldn't create a new system image backup since reads kept failing

Here are the details of the Windows Event Log - HD Bad Block (7) service

At 2017-01-11 09:18:43 the Windows Event Log - HD Bad Block (7) service transitioned from a Normal state to a Failed state

When I looked at my "this PC" window, there was the new drive C, with a huge cornfield's worth of space waiting for me