[ILUG] SCSI [OT]

[Liam Bedford]

> -----Original Message-----
> From: ilug-admin at linux.ie [mailto:ilug-admin at linux.ie]On Behalf Of David
> Murphy
>
>
> Quoting <20000322090138.E955 at online.ie>
> by "John P. Looney" <jplooney-ilug at online.ie>:
>
> > On Wed, Mar 22, 2000 at 03:15:39AM +0000, David Murphy mentioned:
> > > Me, I'd expect the OS driver would need to know that devices are
> > > likely to go wandering around the SCSI target space like that, so it
> > > can find its boot disk if it's suddenly moved from t0 to t11, but I'm
> > > happy to be referred to a nice document explaining why that isn't so.
>
> >  And I'd be quite sure Solaris X86 wouldn't manage it. Changing the PCI
> > slot that the SCSI card the boot disk is on it likely to give it a heart
> > attack...
>
> Perfect example. Anything that expects the path to the boot device to
> be stable is going to be totally bamboozled if the boot device moves.

I was about to say something along those lines. The basic situation is that
so far, nothing except Windows/Dos has managed to come up with a way of
having
a root device agnostic way of mounting it's partitions (I don't think devfs
is
going to fix this either though :().

All big operating systems have hard coded into them where the root device is
(Try changing WinNT's boot device on it!).

That said, I consider the SCAM thing not to be the cause of the problem...
given
the same situation you mentioned, without SCAM, you'd still have the same
resolution,
and the same problem when you boot the OS. SCAM just means the devices
can work it out, and I don't think they do it on the fly... Saves me getting
another
slice from a case as I try to change fiddly little jumpers..

L.
---
Liam Bedford				01-4170153
System Administrator			WBT Systems, Block 2, Harcourt Ctr.,
					Harcourt St., Dublin 2