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Any reason why you might expect it? Is it the same as the XServe adapter or/and is that support built into OS X?
 
just an assumption. It was designed to work with the 5000X chipset. I would assume that Apple would take advantage of this..
 
Worth asking product support I guess. I've got some spare SAS drives lying around and it seems silly not to use the fastest drives in a machine like the Pro. Dunno why it's hobbled like this when practically all the competitors have SAS options.
 
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