Re: SCSI disk devices

Mark H. Wood (mwood@mhw.OIT.IUPUI.EDU)
Sat, 10 May 1997 07:59:04 -0500 (EST)

On Wed, 30 Apr 1997, Steven N. Hirsch wrote:

> On Wed, 30 Apr 1997, Dave Barr wrote:
> > In message <m0wMcJ1-0008zEC@seneca>, Harald Milz writes:
> > >There is one more point to that. We are eventually going to have an SSA
> > >device driver, and SSA tends to be used in large server installs. Each
> > >disk is presented to the OS as a single SCSI disk ... so I think we need
> > >a major change in disk numbering, not just 16 more devices by one more
> > >major number. 16 bit minors (and majors, for that matter) would be the
> > >cleanest solution IMHO. That's what commercial Unixes tend do offer.
> >
> > If we do that, we _definately_ have to adopt something like the
> > Solaris /dev/dsk/c0t0d0s3 scheme. It gets really tiring trying to out-
> > guess what the kernel is going to name a new disk when it's put online.
> Eric Youngdale wrote a nice utility which does exactly this! Try scsidev.
> I couldn't live without it. Not sure why it never caught on with any of
> the distributions..

I've been thinking for some time that mount ought to have an option to
mount by label, rather than by device name, for volumes that can be labelled.
(Unfortuately, not seriously enough to have implemented it yet.) Let the
machine find the partition for you! I know that ext2 filesystems can be
labelled, and that should take care of the majority of interesting
cases. Comments?

Mark H. Wood, Lead System Programmer MWOOD@INDYVAX.IUPUI.EDU
Those who will not learn from history are doomed to reimplement it.