sanity check for disk images

[maitre at ccs.neu.edu (Brad Noyes)]

Hello,

I wrote a small script for copying images from a floppy disk 
to the hard drive, and from floppy disk to floppy disk. I use
the dd command to create the images. When i create the images
I want to be able to check if the images were make properly. 
Is there a way that i can run a sanity check on the images make
on the hard drive? And is there a way to check whether the 
disk to disk copy was made properly?

Thanks,
--Brad  
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