From owner-freebsd-mobile Tue Mar 13 1:10:46 2001 Delivered-To: freebsd-mobile@freebsd.org Received: from guru.mired.org (okc-65-26-235-186.mmcable.com [65.26.235.186]) by hub.freebsd.org (Postfix) with SMTP id 2F90837B719 for ; Tue, 13 Mar 2001 01:10:43 -0800 (PST) (envelope-from mwm@mired.org) Received: (qmail 69166 invoked by uid 100); 13 Mar 2001 09:10:42 -0000 From: Mike Meyer MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15021.58386.377695.943846@guru.mired.org> Date: Tue, 13 Mar 2001 03:10:42 -0600 To: Helge Oldach Cc: bright@wintelcom.net (Alfred Perlstein), oberman@es.net, sos@freebsd.dk, mobile@FreeBSD.ORG, stable@FreeBSD.ORG Subject: Re: Disk I/O problem in 4.3-BETA In-Reply-To: <200103130848.JAA08707@galaxy.de.cp.philips.com> References: <20010312140636.A18351@fw.wintelcom.net> <200103130848.JAA08707@galaxy.de.cp.philips.com> X-Mailer: VM 6.89 under 21.1 (patch 14) "Cuyahoga Valley" XEmacs Lucid X-face: "5Mnwy%?j>IIV\)A=):rjWL~NB2aH[}Yq8Z=u~vJ`"(,&SiLvbbz2W`;h9L,Yg`+vb1>RG% *h+%X^n0EZd>TM8_IB;a8F?(Fb"lw'IgCoyM.[Lg#r\ Sender: owner-freebsd-mobile@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Helge Oldach types: > Generally I'd say it's not a bad idea to have write caching on the disk > enabled - assuming that it is decently implemented. BTW, don't SCSI > disks use write cacheing as well? :-) Yes, they do. And it's recommended that you turn it off if you turn on softupdates. The driver doesn't do it for you, though. I'd be interested to know details about why softupdates makes it more critical to have write caching off. http://www.mired.org/home/mwm/ Independent WWW/Perforce/FreeBSD/Unix consultant, email for more information. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-mobile" in the body of the message