From owner-freebsd-questions Wed Mar 6 6:55:28 2002 Delivered-To: freebsd-questions@freebsd.org Received: from post-20.mail.nl.demon.net (post-20.mail.nl.demon.net [194.159.73.1]) by hub.freebsd.org (Postfix) with ESMTP id 2A73937B402 for ; Wed, 6 Mar 2002 06:55:24 -0800 (PST) Received: from [212.238.194.207] (helo=mailhost.raggedclown.net) by post-20.mail.nl.demon.net with esmtp (Exim 3.35 #2) id 16icp9-000CVa-00 for questions@FreeBSD.ORG; Wed, 06 Mar 2002 14:55:23 +0000 Received: from angel.raggedclown.net (angel.raggedclown.intra [192.168.1.7]) by mailhost.raggedclown.net (Ragged Clown Mail Gateway [buffy]) with ESMTP id 1C64B13040 for ; Wed, 6 Mar 2002 15:55:22 +0100 (CET) Received: by angel.raggedclown.net (Ragged Clown Host [angel], from userid 1005) id 8B6C022595; Wed, 6 Mar 2002 15:55:17 +0100 (CET) Date: Wed, 6 Mar 2002 15:55:17 +0100 From: Cliff Sarginson To: questions@FreeBSD.ORG Subject: Re: Softupdates on root in 4.5-RELEASE Message-ID: <20020306145517.GE4280@raggedclown.net> References: <47615415@toto.iv> <15493.57118.414479.492155@guru.mired.org> <20020306143532.GC4280@raggedclown.net> <20020306144816.C2BBFBA03@i8k.babbleon.org> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20020306144816.C2BBFBA03@i8k.babbleon.org> User-Agent: Mutt/1.3.27i Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Wed, Mar 06, 2002 at 09:48:16AM -0500, Brian T. Schellenberger wrote: > On Wednesday 06 March 2002 09:35 am, Cliff Sarginson wrote: > | On Wed, Mar 06, 2002 at 03:19:26AM -0600, Mike Meyer wrote: > | > I personally make the root partitoin larger, enable soft updates, and > | > use SCSI disks with proper tagged queuing support so the write cache > | > isn't a problem. > | > | Can you clarify this a bit. > | With a SCSI disk, tagged queuing etc, soft-updates are not helpful ? > | yes or no ? > > No. That is, they ARE helpful. > > But with tagged queuing on a SCSI disk, write caching isn't dangerous, so > there's no reason not to use it. > > With an IDE disk, write caching IS dangerous. > > Another advantage of SCSI. > Ok, so currently this BSD system runs off SCSI with soft-updates on everything, except root. Would you recommend that optimal performance would be achieved, without danger, by enabling write-caching as well ? And what would you recommend therefore with root, which has neither enabled at the moment ? -- Regards Cliff Sarginson -- To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message