From owner-freebsd-hardware@FreeBSD.ORG Wed Jun 9 12:07:45 2004 Return-Path: Delivered-To: freebsd-hardware@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 1DDC816A4CE for ; Wed, 9 Jun 2004 12:07:45 +0000 (GMT) Received: from szamoca.krvarr.bc.ca (s142-179-111-232.bc.hsia.telus.net [142.179.111.232]) by mx1.FreeBSD.org (Postfix) with ESMTP id B184A43D53 for ; Wed, 9 Jun 2004 12:07:34 +0000 (GMT) (envelope-from sandy@krvarr.bc.ca) Received: from szamoca.krvarr.bc.ca (localhost [127.0.0.1]) by szamoca.krvarr.bc.ca (8.12.11/8.12.6) with ESMTP id i59C6iKa004453; Wed, 9 Jun 2004 05:06:54 -0700 (PDT) Received: (from sandy@localhost) by szamoca.krvarr.bc.ca (8.12.11/8.12.11/Submit) id i59C6id5004450; Wed, 9 Jun 2004 05:06:44 -0700 (PDT) (envelope-from sandy) From: Sandy Rutherford MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <16582.64846.807035.40352@szamoca.krvarr.bc.ca> Date: Wed, 9 Jun 2004 05:06:38 -0700 To: Peter Jeremy In-Reply-To: <20040608084133.GD622@cirb503493.alcatel.com.au> References: <16577.22341.271281.286853@szamoca.krvarr.bc.ca> <20040608084133.GD622@cirb503493.alcatel.com.au> X-Mailer: VM 7.07 under Emacs 21.3.1 cc: freebsd-hardware@freebsd.org Subject: Re: Tape drive support in mlx driver? X-BeenThere: freebsd-hardware@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: General discussion of FreeBSD hardware List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 09 Jun 2004 12:07:45 -0000 Peter, On Tue, 8 Jun 2004 you wrote: > On Fri, 2004-Jun-04 22:16:53 -0700, Sandy Rutherford wrote: >> Are tape drives supported with the Mylex DAC RAID controllers? I have >> been unable to get it to work or find anything about tape drives in >> the mlx documentation? > Tapes aren't supported by DAC960's on Compaq/HP Tru64 Unix so I > suspect it is non-trivial (though I vaguely recall that they were > supported by NT/Alpha so it may be possible). The eXtremeRAID 1100 isn't a DAC960; it's a DAC1164P. Here is my understanding of the situation: The DAC960 only supports firmware up to ver. 4.x. However, the DAC1164P supports firmware up to ver. 5.x. Although, Mylex firmware <= 4.x does not support tape drives, ver. >= 5.x supports both tape drives and cdroms. The mly(4) driver works for Mylex RAID controllers with firmware >= 6.x. mly(4) does interface to the SCSI sub-system and would therefore presumably handle tape drives. The mlx(4) driver is for firmware <= 5.x and it does not interface to the SCSI subsystem. So, it seems that the DAC1164P falls through the crack in the middle. I have no idea how different the 5.x firmware is from the 6.x firmware and whether it would be feasible to get mly(4) working with 5.x firmware. After an extensive search, I have not been able to find 6.x firmware for the DAC1164P. It seems that 5.x is the most recent available for this controller. Thanks, Sandy