Re: Shut one HD of 2 off?
"Patrick Keenan" <test@dev.null> wrote in message
news:uYBYT1suIHA.2292@TK2MSFTNGP05.phx.gbl...
> "Anton" <nosp@m.com> wrote in message
> news:%23YzYVasuIHA.1236@TK2MSFTNGP02.phx.gbl...
> > 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 software:
http://revosleep.realspooky.de/