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Date:      Sat, 28 Sep 1996 01:05:20 +0200 (MET DST)
From:      J Wunsch <j@uriah.heep.sax.de>
To:        freebsd-scsi@freebsd.org
Cc:        richard@cogsci.ed.ac.uk
Subject:   Re: HP T4000s tape drive
Message-ID:  <199609272305.BAA13439@uriah.heep.sax.de>
In-Reply-To: <9295.199609211530@pitcairn.cogsci.ed.ac.uk> from "richard@cogsci.ed.ac.uk" at "Sep 21, 96 04:30:52 pm"

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As richard@cogsci.ed.ac.uk wrote:

> I've just got an HP (Colorado) T4000s tape drive working under FreeBSD
> 2.1.0.  It's a SCSI QIC-3095 drive, 4GB uncompressed.

Good news!

> The main change required is that the PF bit in mode select must be set to
> one.  Is a "quirk" the right way to do this?  I haven't yet looked at

Yep, it is.

> the -current code to see how the SCSI code has changed since 2.1.0.

It has, massively.

> The other changes are to increase SCSI_2_MAX_DENSITY_CODE from 0x17

MAX_DENSITY_CODE should be killed.  I think we were already consent on
this, but nobody did the deed by now.  Well, mmmaybe it's already in
Justin's ongoing SCSI work.

> (not essential, since you can't change the density of this drive) and
> add a SCSI_SILENT flag to the scsi_prevent call in st_mount_tape().

PREVENT ALLOW MEDIUM REMOVAL is optional by the SCSI-2 specs, so we
should perhaps really make the call to it `silent'.

-- 
cheers, J"org

joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ -- NIC: JW11-RIPE
Never trust an operating system you don't have sources for. ;-)



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