"Patrick Keenan" wrote in message
...
"Anton" wrote in message
...
With 2 disks, can I shut one off without pulling a cabel?


Cant see it in BIOS.

Generally, no. You can't do this the way you seem to be describing,
though
it depends on what exactly you mean by "shut off".

Few, if any, power supplies allow selective activation of power
connectors,
so anything that is connected to a running power supply WILL be powered.

I know of no drives that have internal switching to disconnect from live
power - and if they did, how would you turn it back on?.

Either there's power on the drive header, or there isn't, and if there
is,
the drive is spinning (or it's dead). Some drives are built to allow for
hot-swapping without damage, but that's an entirely different thing ...
HTH
-pk


I'm surprised that no one else has yet taken issue with your
comments, but I'm not at all certain that what you suggest is
the case [if by "Either there's power on the drive header, or
there isn't, and if there is, the drive is spinning (or it's dead)"
I correctly understand that you're referring to power at the
4 pin Molex].

To my knowledge, the "Turn off hard-disks:" method listed
under the Power Schemes tab allows a signal to be sent not
to the power supply to cut power to the hard drive, but to the
controller to "spin it down" via interrupting 12 V to the disk
drive motor. This can be clearly demonstrated by observing
that a case fan pigtailed to the 4 wire hard drive power (not
a motherboard) connector will continue to rotate despite the
hard drive being in an "off" state. A VOM can also be trotted
out to verify that each energized (both the 12 vdc & 5 vdc)
conductor and ground wire remain in their assigned states
during this non-rotational mode of operation.

And although I don't advocate its usage (particularly given
that it isn't even supportted by a Windows 98 OS), this
utility would seem to indicate that what the OP wants to do
could be done via softwa http://revosleep.realspooky.de/