[Prev][Next][Index][Thread]

Re: hot-swappable SCSI



On Thu, 20 Feb 1997 01:27:33 +0200 (IST), you wrote:

>On Wed, 19 Feb 1997, Yuval El-Hanany wrote:
>
>> The trick used to be that they had this extra leg in the connector which
>> was shorter than the rest. When you removed the device it would be the
>> first leg removed and would cause whatever action is required before
>> removing the device from the bus.
>
>Extra long and extra short, actually. Extra long for VCC and extra long 
>for ground.
That is, Extra long for ground, and extra short for VCC.

Hot plug guidelines:

First plug ground
Then plug the data signals
And last, plug VCC

When removing the exuipment, do the reverse order.

The PCMCIA connectors are also built this way.

>---MAV                              (finger for PGP signature block)
>My opinions are my own and only my own. Standard disclaimer applies.
>Marc A. Volovic (marc@cs.huji.ac.il)       Linguists do it cunningly

Udi


Follow-Ups: References: