This doesn't make much sense to me, actually. I don't see why SU wouldn't update the system. It *should*, Piggy... what you did is a fully supported path, as long as the 10.4.2 was from the discs that shipped with the Quad.
You can certainly use SD! to copy drive-to-drive, no problem... I don't really have a specific opinion on which drive to use, though. I don't think it's going to matter much.
The two channels of the SATA controller should behave identically...
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--Dave Nanian
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