From owner-freebsd-questions Thu May 6 0:24:45 1999 Delivered-To: freebsd-questions@freebsd.org Received: from finch-post-10.mail.demon.net (finch-post-10.mail.demon.net [194.217.242.38]) by hub.freebsd.org (Postfix) with ESMTP id D004815963 for ; Thu, 6 May 1999 00:24:42 -0700 (PDT) (envelope-from marko@uk.radan.com) Received: from [158.152.75.22] (helo=uk.radan.com) by finch-post-10.mail.demon.net with smtp (Exim 2.12 #1) id 10fIWN-0004qx-0A; Thu, 6 May 1999 07:24:39 +0000 Organisation: Radan Computational Ltd., Bath, UK. Phone: +44-1225-320320 Fax: +44-1225-320311 Received: from support-3.uk.radan.com (support-3 [193.114.228.220]) by uk.radan.com (8.6.10/8.6.10) with ESMTP id IAA02021; Thu, 6 May 1999 08:23:56 +0100 Received: from uk.radan.com by support-3.uk.radan.com (SMI-8.6/SMI-SVR4) id IAA02593; Thu, 6 May 1999 08:23:54 +0100 Message-ID: <37314346.4A7CB5D@uk.radan.com> Date: Thu, 06 May 1999 08:22:46 +0100 From: Mark Ovens Organization: Radan Computational Ltd X-Mailer: Mozilla 4.5 [en] (X11; I; SunOS 4.1.3_U1 sun4m) X-Accept-Language: en-GB MIME-Version: 1.0 To: Greg Lehey Cc: Questions Subject: Re: delays during boot References: <37305116.DCBB1666@castle.net> <19990506085525.J40359@freebie.lemis.com> <373137F5.3DE5DC6A@uk.radan.com> <19990506161419.I40359@freebie.lemis.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG Greg Lehey wrote: > > On Thursday, 6 May 1999 at 7:34:29 +0100, Mark Ovens wrote: > > Greg Lehey wrote: > >> > >> On Thursday, 6 May 1999 at 8:59:31 +1200, Jonathan Chen wrote: > >>> On Wed, 5 May 1999, gkaplan wrote: > >>> > >>>> During the boot process for 2.2.8 there are two significant delays is > >>>> the startup process. They both seem to relate to disk initialization > >>>> (ide) the combined time of delay is 30 to 45 second. Is there a > >>>> modification the I could make to the startup that would shorten this > >>>> time without causing an undesirable side effect. > >>> > >>> You could compile a custom kernel so that it doesn't probe for > >>> non-existent IDE devices. > >> > >> You can also disable them in UserConfig. > > > > On a closely related note, what is SCSI_DELAY for? The message says > > "waiting for SCSI devices to settle" but what exactly is "settling"? I > > can't set mine any lower than 10 seconds and get successful probes > > *every* boot. > > Ah, I know that one. Thought you might :-) > I just wrote it up for the new edition of "The > Complete FreeBSD" (at a bookshop near you Real Soon Now). :-) > In fact, I > had my cursor on it in another window. To quote: > > SCSI_DELAY is the number of milliseconds to wait after resetting the > SCSI bus. This is most evident when probing. This value used to be > in seconds: be careful when upgrading. > > Make sense? > Yes. I knew that much though (it's in the handbook). What I don't understand (but would like to) is what exactly are the devices doing when the "settle", i.e. from a h/w point of view, what happens to the devices that takes 10 seconds when the SCSI bus is reset? > Greg > -- > When replying to this message, please copy the original recipients. > For more information, see http://www.lemis.com/questions.html > See complete headers for address, home page and phone numbers > finger grog@lemis.com for PGP public key -- FreeBSD - The Power To Serve http://www.freebsd.org My Webpage http://www.users.globalnet.co.uk/~markov _______________________________________________________________ Mark Ovens, CNC Apps Engineer, Radan Computational Ltd. Bath UK CAD/CAM solutions for Sheetmetal Working Industry mailto:marko@uk.radan.com http://www.radan.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message