[Bug-ddrescue] Is there a ddrescue manual?

[ddMAC]

The fact that I was able to get a control line program up and running should
be ample proof that there miracles exist and there is a God, but is there
also a manual (especially for Mac), so I could spend my prayer time
discussing more meaningful topics than fixing my my HD?

If not, could someone answer a couple of dumb questions?

What next? 

Instead of ruining the data on my crashed EXT HD, I substituted a DVD
(Beatles) with photos and MP3 files as a guinea pig and ran the following
script:

dd bs=512 if=/Volumes/Beatles of=/Volumes/Macintosh\ HD1/foofoo.dmg
conv=noerror,sync

To try the "stop" feature of ddrescue I stopped the terminal after
collecting 3.4 GB (there is only 2.5 GB of info on that 4 GB disk).  Disk
utility (and Disk Warrior) was unable to open the .dng file and utilities
like Boomerang and Drive Genius found 0 files after a scan.

Will the above code work to salvage my EXT HD data?  How do you
stop/pause/restart ddrescue?  

Thanks for the help!
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