How disk imaging can be useful for data recovery?

How disk imaging can be useful for data recovery?

If we have constraint of not having an empty drive for creating a disk clone, we can create a clone of the faulty disk to an image file on a free disk space.

This also helps in eliminating Bad sectors which may cause further damages while reading them and may increase if their is more read retries by mechanical components of the drive.

The disk should have ample space to store disk image files.