From owner-freebsd-current Thu Oct 8 23:42:28 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id XAA07741 for freebsd-current-outgoing; Thu, 8 Oct 1998 23:42:28 -0700 (PDT) (envelope-from owner-freebsd-current@FreeBSD.ORG) Received: from www.scancall.no (www.scancall.no [195.139.183.5]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id XAA07728 for ; Thu, 8 Oct 1998 23:42:24 -0700 (PDT) (envelope-from Marius.Bendiksen@scancall.no) Received: from super2.langesund.scancall.no [195.139.183.29] by www with smtp id IYMJBPTJ; Fri, 09 Oct 98 06:42:15 GMT (PowerWeb version 4.04r6) Message-Id: <3.0.5.32.19981009083720.00929a20@mail.scancall.no> X-Sender: Marius@mail.scancall.no X-Mailer: QUALCOMM Windows Eudora Light Version 3.0.5 (32) Date: Fri, 09 Oct 1998 08:37:20 +0200 To: "David E. Cross" From: Marius Bendiksen Subject: Re: CDROM as system disk Cc: freebsd-current@FreeBSD.ORG In-Reply-To: References: <199810081905.MAA26707@usr08.primenet.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Sender: owner-freebsd-current@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG >Slight problem, disk caching. If you are going to ping the drive every N >time units as a 'keep-alive', those blocks will very quickly get cached; >unless you devise some clever algorithm that will always ensure that you >get a block not in the cache (consider the cache could me a megabyte or >more in size, and this gets tricky) So, we'll need some function to flush the cache, or do uncached i/o... --- Marius Bendiksen, IT-Trainee, ScanCall AS To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-current" in the body of the message