From owner-freebsd-current@FreeBSD.ORG Mon Oct 25 18:14:58 2004 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id BF3E916A4CE; Mon, 25 Oct 2004 18:14:58 +0000 (GMT) Received: from mail.dt.e-technik.uni-dortmund.de (mail.dt.e-technik.Uni-Dortmund.DE [129.217.163.1]) by mx1.FreeBSD.org (Postfix) with ESMTP id C146043D2D; Mon, 25 Oct 2004 18:14:57 +0000 (GMT) (envelope-from ma@dt.e-technik.uni-dortmund.de) Received: from localhost (localhost [127.0.0.1])D9B82456CA; Mon, 25 Oct 2004 20:14:56 +0200 (CEST) Received: from mail.dt.e-technik.uni-dortmund.de ([127.0.0.1]) by localhost (krusty [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 23181-07-3; Mon, 25 Oct 2004 20:14:56 +0200 (CEST) Received: from m2a2.dyndns.org (p548545DD.dip.t-dialin.net [84.133.69.221]) 8B22F456C8; Mon, 25 Oct 2004 20:14:53 +0200 (CEST) Received: from localhost (localhost [127.0.0.1]) by merlin.emma.line.org (Postfix) with ESMTP id 7DA60DA764; Mon, 25 Oct 2004 20:14:52 +0200 (CEST) Received: from merlin.emma.line.org ([127.0.0.1]) by localhost (m2a2.dyndns.org [127.0.0.1]) (amavisd-new, port 10024) with LMTP id 28438-01; Mon, 25 Oct 2004 20:14:52 +0200 (CEST) Received: by merlin.emma.line.org (Postfix, from userid 500) id 1A83BDA754; Mon, 25 Oct 2004 20:14:51 +0200 (CEST) To: Andre Oppermann In-Reply-To: <417960C2.8040007@freebsd.org> (Andre Oppermann's message of "Fri, 22 Oct 2004 21:34:26 +0200") References: <417960C2.8040007@freebsd.org> From: Matthias Andree Date: Mon, 25 Oct 2004 20:14:51 +0200 Message-ID: User-Agent: Gnus/5.110003 (No Gnus v0.3) Emacs/21.3 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Virus-Scanned: by amavisd-new at dt.e-technik.uni-dortmund.de cc: freebsd-current@freebsd.org Subject: Re: Annoying SCSI waiting... X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 25 Oct 2004 18:14:58 -0000 Andre Oppermann writes: > Can't we just reduce the annoying: > > Waiting 15 second for SCSI devices to settle > > to something shorter like 5 seconds in GENERIC? I know perfectly well where it > came from but these days not many of those slow disks are still around. > > It really annoys the hell out of me waiting the 15 seconds for nothing each time > I boot the GENERIC kernel for testing. Sure I can change that in the kernel > config but then it's modified. Any why take 15 seconds of everyone if only a > very few actually need it (those with stone-age disk drives)? I have several SCSI adaptors around (Tekram DC-390 - AMD53C974 based, several Tekram DC-390U/F - SYM53C8XX based, some Adaptec 2940 variants) and have yet to see one what would not have a BIOS setting to either set the BIOS reset->scan delay, send a START UNIT command (waiting for its completion) or similar. Usually, I have more than one way to work around junk disks such as Micropolis 4345WS (which needed a 10 s reset-to-scan delay with my Tekrams to report back reliably on power-up, it's fine with factory settings of the Adaptec 2940 UW Pro), and my oldish IBM DCAS-32160U or a halfway modern Fujitsu MAH-3182MP drive have no trouble with short inquiry delays at all. I'd support a switch. My kernels all work fine with 2 s delay on all drives I have - when there is trouble, it's after power-up - a kernel delay won't usually help in that case. -- Matthias Andree