🚀 go-pugleaf

In article <2kej0lF18gr2U1@uni-berlin.de>, 
"Rod Speed" <rod_speed@yahoo.com> wrote:
>
>Phred <ppnerkDELETETHIS@yahoo.com> wrote
>in message news:2kdbfmFugvvU2@uni-berlin.de...
>> Timothy Daniels <TDaniels@NoSpamDot.com> wrote
>>> CJT wrote
>>>> Who knows what state they're in when they're unpowered?
>>>    1)  Is there a "state" when the circuits are unpowered?
>>>    2)  How is the "state" of an unpowered circuit going to
>>>         affect the signal passing by?
>
>> Going back a few years, ISTR that the manual for the TRS-80 Model
>> I stated that peripherals should all be powered up before (or at least
>> simultaneously with) the computer to avoid damage to unpowered circuits.
>
>It was always much more complicated than that.

It always is.  :-)

>RS232 was designed right from the start to not only
>handle that fine, but to hand shorts in the cable fine too.
>In spades with USB and firewire now too.
>
>> Don't ask me why this was recommended; but I *assumed* it
>> had something to do with signal current paths that were perhaps
>> "open" when they shouldn't have been, and thus more susceptible.
>
>To some extent. Not relevant now tho.

Getting back to the OP's original question then, I assume you're happy 
to have a 2nd HDD unpowered but not unplugged?  Or, perhaps more to 
the point for convenience, which way would you do it -- disconnect the 
power, or disconnect the interface?  Or both?


Cheers, Phred.

-- 
ppnerkDELETE@THISyahoo.com.INVALID