Responding to a periodically hot topic, Glenn R. Fong 
<[EMAIL PROTECTED]> wrote (to which I add my 2c):

> Our longrunning discussions regarding hot-swapping external devices reminds
> me to ask about the advisability of (a) putting my PB [2400] to sleep; (b)
> then powering down my SCSI, external monitor, and other externals; (c) then
> powering them all back up before (d) reawakening the PB?
>
> As with many of us, I prefer sleeping the PB over shutting it down. <snip>

Shut down is preferable to sleep as sleep is to hot swaps. (But, at my own
calculated risk (depending on what the case is and how much of a hurry I'm
in), I violate these canons too.)  In real life I happen to agree with Paul
Vail but live a little more like Mark Sira (after all, if we were all so
religious about our powerbook behavior, "fixers" wouldn't be living so well
;)

You can get away with hot plugging on:
Serial (printer, localtalk), modem, ethernet, floppy, sound, power adapter

You can get away with sleep plugging (but I always shut down--it's more the
patience and the self-discipline, than the problem of time):
SCSI (manually dismount/mount icons), ADB* (*Wallstreet can be ADB hot
plugged)

On the rare occasion it happened, I've gotten away with one or two
accidental hot unplugs of SCSI (when active data transfer was not occurring)
and ADB.

On the rare occasion it happened, I've NOT gotten away with an accidental
hot unplug of SCSI (when active data transfer was occurring) and ADB on a
hot replug (back in the 68030 IIcx/ci era).

> And a side question on hot-swapping: there seems to be some disagreement on
> hot-swapping video out to external monitors while in sleep mode.  Can we
> come to consensus on this one?

Testing adapter multi-res video pin configurations w/o a manual, I've
successfully hot swapped video out to external monitors in hot and sleep
modes on a desktop but never tried it on the (more delicate? and certainly
much more expensive!) Powerbooks.

These are not recommendations and there will never be a consensus. Anything
other than a full shutdown is higher risk. But even powering up anew entails
some statistical risk...

---
Sidney Ho
[EMAIL PROTECTED]
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