> On Sat, Jul 14, 2001 at 12:19:08PM -0400, der Mouse wrote:
> > > I can't see why you would want to detach all periph without
> > > detatching the associated bus, [...]
> >
> > Say I've got a second SCSI card in the machine and I am about to
> > disconnect - or just have disconnected - the cable to multiple external
> > devices.  It may be more convenient to just "detach 'em all" than going
> > through to figure out which ones to hit.
>
> How would the controller know that you have disconnected the cable ?
> All it'll see are selection timeout errors.

Don't necessarily assume this. For things like USB or Fibre Channel you'll
know if the entire bus has been wiped. It's also true that in some SPI SCSI
configurations you might in fact know if an entire cable is gone (extra cable
detect lines).

-matt