| Technote HW 510 | October 1990 |
Last reviewed: 3/18/93
Can you give us your suppliers' internal hard disk drive power specifications?
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The power budget allocated for each slot or drive bay is *all* that you can depend on.
Apple changes drive vendors all the time! Vendors have the freedom to change their own power draw specs (within the limit of the bay spec, which Apple provides) at any time. If you're trying to find some "extra" power that Apple's stashed away and isn't telling you about, it just isn't there. There's no way for you to know whether a user has changed drives or what other expansion cards in the system are drawing power. The system will work only if *all* suppliers stay with in the allocated budget.
You're doing yourself and your customers no favors if you attempt to run at the
ragged edge. If you can't fit your design in the allocated budget, you need a
more power-efficient design. Remember that Macintosh users don't all leave
their machines empty in a perfectly air-conditioned office. You need to
anticipate machines with all slots full running at the edge of the spec in very
hot environments. Will your drive stand up to that? Will the Macintosh smoke?
Will your customer be happy?
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