From owner-freebsd-hackers Mon Sep 11 20:56:35 1995 Return-Path: hackers-owner Received: (from majordom@localhost) by freefall.freebsd.org (8.6.12/8.6.6) id UAA19372 for hackers-outgoing; Mon, 11 Sep 1995 20:56:35 -0700 Received: from irz201.inf.tu-dresden.de (irz201.inf.tu-dresden.de [141.76.1.10]) by freefall.freebsd.org (8.6.12/8.6.6) with ESMTP id UAA19366 for ; Mon, 11 Sep 1995 20:56:33 -0700 Received: from sax.sax.de by irz201.inf.tu-dresden.de (8.6.12/8.6.12-s1) with ESMTP id FAA23608 for ; Tue, 12 Sep 1995 05:56:24 +0200 Received: by sax.sax.de (8.6.11/8.6.12-s1) with UUCP id FAA03579 for hackers@freebsd.org; Tue, 12 Sep 1995 05:55:08 +0200 Received: (from j@localhost) by uriah.heep.sax.de (8.6.12/8.6.9) id FAA27598 for hackers@freebsd.org; Tue, 12 Sep 1995 05:54:36 +0200 From: J Wunsch Message-Id: <199509120354.FAA27598@uriah.heep.sax.de> Subject: Re: higher density diskettes To: hackers@freebsd.org Date: Tue, 12 Sep 1995 05:54:35 +0200 (MET DST) Reply-To: hackers@freebsd.org In-Reply-To: <199509121259.MAA16918@thumper.osix.com.au> from "Peter May" at Sep 12, 95 01:12:46 pm X-Phone: +49-351-2012 669 X-Mailer: ELM [version 2.4 PL23] MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8bit Content-Length: 865 Sender: hackers-owner@freebsd.org Precedence: bulk As Peter May wrote: > That should speed the performance of this already flaky driver up no > end! :-) Badly designed: yes. But flakey? How? Why? We've got one of the fastest floppy disk drivers. :-) It's even about 10 % faster than Linux (for sequential reads), i've heard that old Xenix' are as fast, and it's way faster than all commercial Unices i've seen. (For sequential reads, and i consider them the most typical _unix_ usage [tar floppy], we get 30 KB/s, that's 2/3 of the raw data rate, and basically proves that we don't use revolutions.) Of course, all this assumes that you're issuing larger requests than single-sector, otherwise the o/s overhead may come into your way and make you lose revolutions. -- cheers, J"org joerg_wunsch@uriah.heep.sax.de -- http://www.sax.de/~joerg/ Never trust an operating system you don't have sources for. ;-)