From mboxrd@z Thu Jan 1 00:00:00 1970 From: Pat LaVarre Subject: Re: [PATCH/RFT] mode sense madness always use page 8 Date: 31 Oct 2003 13:47:26 -0700 Sender: linux-scsi-owner@vger.kernel.org Message-ID: <1067633246.5742.49.camel@patrh9> References: Mime-Version: 1.0 Content-Type: text/plain Content-Transfer-Encoding: 7bit Return-path: Received: from email-out2.iomega.com ([147.178.1.83]:22668 "EHLO email.iomega.com") by vger.kernel.org with ESMTP id S263545AbTJaUrw (ORCPT ); Fri, 31 Oct 2003 15:47:52 -0500 In-Reply-To: List-Id: linux-scsi@vger.kernel.org To: stern@rowland.harvard.edu Cc: patmans@us.ibm.com, ronald@kuetemeier.com, linux-scsi@vger.kernel.org, usb-storage@one-eyed-alien.net, james.bottomley@steeleye.com > > > I am very doubtful that this will work, or rather that it will work with > > > all devices. I've seen _lots_ of reports of USB devices that can't handle > > > page 8, with all sorts of combinations of values for len attempted. > > > > Are we confident that back then we tried the Win value for len? > > > > Are we confident the Win value is x1C = header + optional block > > descriptor + page? > > Not at all. You mentioned that it might be because you had seen it in a > trace posted not long ago. But I think that was a trace from a Linux > host, not a Windows host. Anyway, as you can see from Ronald's most > recent test, using that request didn't work with his device. I'm still struggling to reconcile your history of pain with mine. I find this particular statement slightly too broad to include me. I agree we know Ronald's CB device choked over what we gave it. I don't yet know if Ronald's device didn't like bits of the CDB, bits of the CDB length, both, or something else. > I don't know what Windows does. I've heard rumors that it determines > whether the drive is writable by actually trying to write a block and > checking to see if the write worked. Me too. Pat LaVarre