From owner-freebsd-hackers Wed Mar 4 17:48:07 1998 Return-Path: Received: (from majordom@localhost) by hub.freebsd.org (8.8.8/8.8.8) id RAA20286 for freebsd-hackers-outgoing; Wed, 4 Mar 1998 17:44:55 -0800 (PST) (envelope-from owner-freebsd-hackers@FreeBSD.ORG) Received: from dingo.cdrom.com (dingo.cdrom.com [204.216.28.145]) by hub.freebsd.org (8.8.8/8.8.8) with ESMTP id RAA20168 for ; Wed, 4 Mar 1998 17:44:28 -0800 (PST) (envelope-from mike@dingo.cdrom.com) Received: from dingo.cdrom.com (localhost [127.0.0.1]) by dingo.cdrom.com (8.8.8/8.8.5) with ESMTP id RAA23401; Wed, 4 Mar 1998 17:37:50 -0800 (PST) Message-Id: <199803050137.RAA23401@dingo.cdrom.com> X-Mailer: exmh version 2.0zeta 7/24/97 To: shimon@simon-shapiro.org cc: Remy NONNENMACHER , hackers@FreeBSD.org, Terry Lambert Subject: Re: Disk write caches In-reply-to: Your message of "Wed, 04 Mar 1998 17:35:56 PST." Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Wed, 04 Mar 1998 17:37:49 -0800 From: Mike Smith Sender: owner-freebsd-hackers@FreeBSD.org Precedence: bulk X-Loop: FreeBSD.ORG > > 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. Do you know of any that do DMA? That'd be something *very* much worth supporting. -- \\ Sometimes you're ahead, \\ Mike Smith \\ sometimes you're behind. \\ mike@smith.net.au \\ The race is long, and in the \\ msmith@freebsd.org \\ end it's only with yourself. \\ msmith@cdrom.com To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message