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Date:      Wed, 07 Aug 1996 23:40:21 -0700
From:      "Justin T. Gibbs" <gibbs@freefall.freebsd.org>
To:        "M.R.Murphy" <mrm@Mole.ORG>
Cc:        julian@whistle.com, rd@thrush.com, freebsd-current@FreeBSD.org
Subject:   Re: SCSI Multiple LUN support - 2.2-960801-SNAP 
Message-ID:  <199608080640.XAA14877@freefall.freebsd.org>
In-Reply-To: Your message of "Wed, 07 Aug 1996 14:39:00 PDT." <199608072139.OAA01075@meerkat.mole.org> 

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>> we found so many devices that erroneously responded to
>> all LUNS that we disabled it by default.
>
>A fine reason for leaving it disabled :-)

I think that this approach was appropriate in the early days of SCSI
when a large majority of the devices out there were non-compliant and
simply ignored the lun field.  Very few modern devices suffer from this
problem (the Chinnon 525 is the last one I know of) and more and more
devices require multi-lun support to function fully.  Since NetBSD already
has a full quirk list of the bogus devices, I don't see any reason not
to enable Lun support by default.

>There is also some ctrl-A setup stuff in the 2940 that refers to
>multiple LUN support.

That only affects the BIOS.  It may be recorded in the SEEPROM on the
card so that FreeBSD could honor it, but I'd rather see it become a 
userconfig type of option.

>--
>Mike Murphy  mrm@Mole.ORG  +1 619 598 5874
>Better is the enemy of Good

--
Justin T. Gibbs
===========================================
  FreeBSD: Turning PCs into workstations
===========================================



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