Date: Tue, 14 Sep 1999 15:16:01 +0200 From: Volker Stolz <stolz@Pool.Informatik.RWTH-Aachen.DE> To: Greg Lehey <grog@lemis.com> Cc: Volker Stolz <stolz@Pool.Informatik.RWTH-Aachen.DE>, freebsd-questions@FreeBSD.ORG Subject: Re: Erratic SCSI-ZIP throughput Message-ID: <19990914151601.A378@solo.informatik.rwth-aachen.de> In-Reply-To: <19990912114608.U10106@freebie.lemis.com>; from Greg Lehey on Sun, Sep 12, 1999 at 11:46:08AM %2B0930 References: <19990909123919.A6053@solo.informatik.rwth-aachen.de> <19990912114608.U10106@freebie.lemis.com>
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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.
--
Volker Stolz * stolz@pool.informatik.rwth-aachen.de * PGP
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