From owner-freebsd-scsi Wed Feb 20 13:40:14 2002 Delivered-To: freebsd-scsi@freebsd.org Received: from sax.sax.de (sax.sax.de [193.175.26.33]) by hub.freebsd.org (Postfix) with ESMTP id CB56B37B417 for ; Wed, 20 Feb 2002 13:40:06 -0800 (PST) Received: (from uucp@localhost) by sax.sax.de (8.9.3/8.9.3) with UUCP id WAA02473; Wed, 20 Feb 2002 22:40:03 +0100 (CET) Received: (from j@localhost) by uriah.heep.sax.de (8.11.6/8.11.6) id g1KLVO309627; Wed, 20 Feb 2002 22:31:24 +0100 (MET) (envelope-from j) Date: Wed, 20 Feb 2002 22:31:24 +0100 From: Joerg Wunsch To: Kelly Yancey Cc: freebsd-scsi@FreeBSD.ORG Subject: Re: RBC support patch Message-ID: <20020220223124.A9579@uriah.heep.sax.de> Reply-To: Joerg Wunsch Mail-Followup-To: Joerg Wunsch , Kelly Yancey , freebsd-scsi@FreeBSD.ORG References: <200202201936.g1KJaAO07448@uriah.heep.sax.de> <20020220123457.Y86103-100000@gateway.posi.net> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.2.5i In-Reply-To: <20020220123457.Y86103-100000@gateway.posi.net>; from kbyanc@posi.net on Wed, Feb 20, 2002 at 12:39:28PM -0800 X-Phone: +49-351-2012 669 X-PGP-Fingerprint: DC 47 E6 E4 FF A6 E9 8F 93 21 E0 7D F9 12 D6 4E Sender: owner-freebsd-scsi@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.org As Kelly Yancey wrote: > > They are not broken. READ(6)/WRITE(6) are not mandatory for direct > > access devices by the standard, but READ(10)/WRITE(10) are. > Unfortunately, my copy of the SCSI-2 draft lists READ(10) and > WRITE(10) as optional for direct-access devices. Otherwise, this > would be an easy fix to a > long standing annoyance. :| Hmm, after reading the docs again, i have to correct myself: both are mandatory, either by my SCSI-2 copy as well as by the SCSI-3 drafts i've got. The latter contain a footnote explaining that the 6-byte commands have been kept as `mandatory' since some boot environments require it, while applications are requested to migrate to the 10-byte commands. So perhaps we should simply reverse the logic, use the 10-byte opcodes as default, and collect the list of (too old) devices that require the 6-byte CDBs. How does that sound? -- cheers, J"org .-.-. --... ...-- -.. . DL8DTL http://www.sax.de/~joerg/ NIC: JW11-RIPE Never trust an operating system you don't have sources for. ;-) To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-scsi" in the body of the message