I'm planning on using GNU ddrescue to create a drive image of my failing 1 TB hard drive. Can I store the image sufficiently on another 1 TB hard drive? I figure the answer would be no because the image file would contain header information which in addition to the disk-image itself should exceed the drive`s capacity (in a perfect world, but perhaps not?).
I would clone the drive, but I'm not sure how to make sure the clone isn't modified when booting up the OS (Windows or Linux).