How to use dd?

Rex_chaos · 11-24-2001, 10:14 PM

Hello all,
I have read the help for dd instrument for many times. I don't really know how to use it. I wonder if we can really use "dd" to duplicate a floppy completely(no matter what's contained in the floppy). I have a floppy, which is enclosed with a software, have some mark in some sector to prevent from the illegal copy. I don't know how to duplicate it. I think dd may be work, what's your opinion?

rshaw · 11-24-2001, 10:35 PM

here's a good howto:
http://www.nb.net/~lbudney/linux/misc/dd.html

it should work, it just makes a exact byte by byte copy of the input file, without regard to what the data it's copying is or does.

if you don't have two floppy drives you'll have to move the data twice, once from the floppy to somewhere on your hard drive, then insert a new floppy and move it from the hard drive back to the floppy.

concoran · 11-24-2001, 11:41 PM

Try
dd if=/dev/fd0 of=copy.img

hopefully. it may work.
To verify, take a blank floppy, and run
dd if=copyimg of=/dev/fd0

if both the floppies are identical, then you succeeded