Subject: Re: Polling SCSI bus
From: Nathan A. McQuillen (nm@steaky.dhs.org)
Date: Mon Nov 05 2001 - 12:44:24 MST
Right. I've been doing it for years and years, even (cover your eyes!! the
horror!!) using a DB-25 switchbox (unmount drives on Machine 1, switch
chain via box to machine 2, run Drive Setup, command-M, drives pop up all
happy -- blasphemy i know but having dealt with replacing a few HDI SCSI
ports on Powerbooks I'd rather do just about anything that doesn't
repeatedly stress the ports). Anyway, I don't want to do anything that
heinous here, just want to be able to load data onto a drive I'm
eventually going to be using with a Debian install on a Powerbook 170
(only 6MB of RAM, so I have to work without a boot ramdisk) and disconnect
and reconnect the drive a few times without having to take my whole system
down.
Might it work to compile a kernel with only module scsi support, then
unload and reload the module to rescan?
- N2
On Mon, 5 Nov 2001, Charlie Watts wrote:
> On Mon, 5 Nov 2001, nathan r. hruby wrote:
> > On Mon, 5 Nov 2001, Nathan A. McQuillen wrote:
> > > Quick question, can't find this in the howtos:
> > >
> > > how do I re-poll the scsi bus (2.2.19 kernel) if I add devices? do i have
> > > to reboot (as some info I found suggested) or is there an easier way
> > > (with kernel scsi support, no scsi modules in use)?
> >
> > SCSI *isn't* hot plugable unless you have a array or something designed
> > *specficly* for that purpose. Typically the plugging and unplugging of
> > SCSI devices will have bad effects on the drive and SCSI Host Adaptor. So
> > umm, yes typically you should reboot :)
>
> Hrm. But that's not quite the question. Is it -possible- to force a
> re-scan?
>
> (We used to plug and unplug scsi devices in MacOS all the time - SCSI
> Probe could rescan the bus and it 'just worked'.)
>
> I crossed my fingers every time I did it ...
>
>
This archive was generated by hypermail 2a24 : Mon Nov 05 2001 - 12:56:28 MST