From owner-freebsd-questions Tue Sep 14 16: 0:50 1999 Delivered-To: freebsd-questions@freebsd.org Received: from freebie.lemis.com (freebie.lemis.com [192.109.197.137]) by hub.freebsd.org (Postfix) with ESMTP id E1EA21528A for ; Tue, 14 Sep 1999 16:00:42 -0700 (PDT) (envelope-from grog@freebie.lemis.com) Received: (from grog@localhost) by freebie.lemis.com (8.9.3/8.9.0) id IAA33976; Wed, 15 Sep 1999 08:30:29 +0930 (CST) Date: Wed, 15 Sep 1999 08:30:28 +0930 From: Greg Lehey To: Volker Stolz Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Erratic SCSI-ZIP throughput Message-ID: <19990915083028.A30655@freebie.lemis.com> References: <19990909123919.A6053@solo.informatik.rwth-aachen.de> <19990912114608.U10106@freebie.lemis.com> <19990914151601.A378@solo.informatik.rwth-aachen.de> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-Mailer: Mutt 0.95.4i In-Reply-To: <19990914151601.A378@solo.informatik.rwth-aachen.de>; from Volker Stolz on Tue, Sep 14, 1999 at 03:16:01PM +0200 WWW-Home-Page: http://www.lemis.com/~grog X-PGP-Fingerprint: 6B 7B C3 8C 61 CD 54 AF 13 24 52 F8 6D A4 95 EF Organization: LEMIS, PO Box 460, Echunga SA 5153, Australia Phone: +61-8-8388-8286 Fax: +61-8-8388-8725 Mobile: +61-41-739-7062 Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG On Tuesday, 14 September 1999 at 15:16:01 +0200, Volker Stolz wrote: > On Sun, Sep 12, 1999 at 11:46:08AM +0930, Greg Lehey wrote: >> On Thursday, 9 September 1999 at 12:39:19 +0200, Volker Stolz wrote: >>> I always wondered why my ZIP is sooo slow (under FreeBSD, Win98 flies!), so I measured it >>> using "ftp localhost" with a mounted ZIP and msdos-FS. >>> Few files (all of about 5MB, give or take a few bytes) were transfered with ca. 1.8M/s, >>> while most just made it to 80K/s and sometimes even below. >>> I'm using the ncr810, everything is properly terminated. The problem occured under 2.2.x, too. >> >> There's a certain amount of overhead involved in copying a file, and I >> suspect that what you're seeing is related, especially if the big >> files are moving fast. What does iostat show? I don't know the >> specs, but I'd expect about 30 to 50 transfers a second for a Zip >> drive. > > You're right, it shows 48 tps and 0.09 M/s. But hell, that's too slow! At least compared > with acceses from Win{NT,98} to the same drive. It depends on what transfers you're doing. If you're transferring .09 MB in 48 transfers, your average transfer size is about 2 kB. You should be able to do better than that on an average mix. Greg -- When replying to this message, please copy the original recipients. For more information, see http://www.lemis.com/questions.html See complete headers for address, home page and phone numbers finger grog@lemis.com for PGP public key To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message