SCSI->IDE command translation isnt too hard providing you stick to simple
stuff and blindly ignore things like ATAPI, SMART, and all the control
stuff. The moment you get into the complex stuff its deeply unfunny.
On the read/write side SCSI->IDE command mapping generally works out. Its
not pretty on the corner cases (like error mapping) and it does mean you
have a lot of excess overhead and potentially serious problems with performance
because IDE (well ATA technically) is very very sensitive to round trip time
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