From owner-freebsd-hackers Wed Mar 4 17:29:54 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id RAA15985 for freebsd-hackers-outgoing; Wed, 4 Mar 1998 17:29:54 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from sendero.simon-shapiro.org (sendero-fxp0.Simon-Shapiro.ORG [206.190.148.34]) by hub.freebsd.org (8.8.8/8.8.8) with SMTP id RAA15845 for ; Wed, 4 Mar 1998 17:29:25 -0800 (PST) (envelope-from shimon@sendero-fxp0.simon-shapiro.org) Received: (qmail 15886 invoked by uid 1000); 5 Mar 1998 01:35:56 -0000 Message-ID: X-Mailer: XFMail 1.3-alpha-021598 [p0] on FreeBSD X-Priority: 3 (Normal) Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 8bit MIME-Version: 1.0 In-Reply-To: Date: Wed, 04 Mar 1998 17:35:56 -0800 (PST) Reply-To: shimon@simon-shapiro.org Organization: The Simon Shapiro Foundation From: Simon Shapiro To: Remy NONNENMACHER Subject: Re: Disk write caches Cc: hackers@FreeBSD.ORG, Terry Lambert Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On 04-Mar-98 Remy NONNENMACHER wrote: ... > Not sure IMHO. Typical wait time before write starts is 20 to 50 ms or > half the internal disk buffers. Far less than sync daemon. Get a caching controller, they start at $250.00 for IDE ones. I measure 2us or less for a cache hit to such controller. I agree that RAID-0 could (should) be viewed as throw away any to the wind in the name of performance. ---------- Sincerely Yours, Simon Shapiro Shimon@Simon-Shapiro.ORG Voice: 503.799.2313 To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message