In message , Mark
Twain writes:
Unfortunately the 780 doesn't have a
second SATA power cable(the smaller of
the two) so I can only test one HD at a
time and then have to move to cable to
the other HD to test it.
[]
The SATA power cable is actually the _larger_ one; for whatever reason
(I can't think of a good one other than economy of parts storage - and
that only for those involved in the actual connector _manufacture_,
everyone else having to store two connectors anyway), they chose to use
the same actual pins for power as for data, meaning - to get the current
capability - they had to use three of them. (Times three for
ground/earth and the two power rails, makes at least 9. The data
connector, being serial [that's what the S is for of course], only needs
one and a clock line [perhaps each way, and the odd control line].)
--
J. P. Gilliver. UMRA: 1960/1985 MB++G()AL-IS-Ch++(p)Ar@T+H+Sh0!:`)DNAf

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