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Re: Swapping Drives - Sanity Check




On Sat, Feb 23, 2019 at 11:11:18AM -0500, Michael Stone wrote:
> On Sat, Feb 23, 2019 at 09:41:27AM -0500, rhkramer@xxxxxxxxx wrote:
> >On Saturday, February 23, 2019 07:53:23 AM Pascal Hambourg wrote:
> >>Le 23/02/2019 à 08:53, David Christensen a écrit :
> >>> Understand that if you disconnect the power cable to a motherboard,
> >>> drive, peripheral, etc., but not all the other cables (e.g. SATA cable),
> >>> you can fry electronics.
> >>
> >>Right. This is why power pins are longer than data pins in plug&play
> >>connectors, so that they are connected first and disconnected last.
> >
> >Hmm, that surprises me -- I guess I would have expected that you want the data
> >pins connected first (while no power is applied), and disconnected last (again,
> >while no power is applied).  Interesting,
> 
> You generally want ground connected first.

And Vcc before signal. Always. The order of ground and Vcc is actually not
*that* critical (although if I had a choice, I'd start with ground).

Cheers
-- t

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