@ Carvedeye
DiskSalv can take what seems like a long time simply because it was the best written program of it's type, it does a lot more checking of the disks and carries out a lot more recovery options/ attempts compared to others like FixDisk, but it's worth the extra time spent if the disk is valuable to you...

I've never known X-Copy to have a repair function in it. It has a "checkdisk" function to report errors but no salvage or repair function (at least X-CopyPro which I still use hasn't)...

Handy tip:-
A very simple way to check a floppy disk properly that you may be going to use to write stuff to is:- Use X-Copy to FORMAT the disk as it will soon tell you if the disk has any bad sectors that can't be written to...

This also applies to disks that you can't Format using the Amiga's Format command or menu. For example some programs (mostly games) will write it's high scores or saved games in a non-DOS format. If you chose later on on to use these disks for something else but when you try to Format them with the Amiga DOS Format command/ menu option and find you can't, then use the Format option in X-Copy and in most cases this will make the disk fully usable again (it's great for recovering disks that appear to appear to Amiga DOS to be knackered) ...

If I may ask, what is it your trying to repair and what is it you have now managed to delete totally as myself or others here may be able to help you out in replacing these damaged disks...
