🚀 go-pugleaf

In article <2kghjiF239vnU1@uni-berlin.de>, "Rod Speed" <rod_speed@yahoo.com> wrote:
>
>Phred <ppnerkDELETETHIS@yahoo.com> wrote
>in message news:2kfvk2F1kfedU2@uni-berlin.de...
>> Rod Speed <rod_speed@yahoo.com> wrote
>>> Phred <ppnerkDELETETHIS@yahoo.com> wrote
>>>> 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.  :-)
>
>You're getting there, grasshopper |-)
>
>>> 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,
>
>Tad radical.
>
>> I assume you're happy to have a 2nd HDD unpowered but not unplugged?
>
>Nope, I dont think THAT is a good idea.
>
>It usually does work, but not always, you can see some
>problems with the bios working out what drives are present etc.
>
>Thats a different issue to the damage question tho.
>
>> Or, perhaps more to the point for convenience,
>> which way would you do it -- disconnect the
>> power, or disconnect the interface?  Or both?
>
>I always disconnect both.
>
>And I dont like the major kludge that removable drive bays
>involve, I prefer to use a proper formal standard like USB
>or firewire or SATA that defines that behaviour fully.

And you reckon *I'm* a tad radical!  8-)

Incidentally, does the SATA spec make such things simpler than the 
older ATA?


Cheers, Phred.

-- 
ppnerkDELETE@THISyahoo.com.INVALID