*BSD News Article 25476


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From: jcargill@oka.cs.wisc.edu (Jon Cargille)
Newsgroups: comp.os.386bsd.misc
Subject: Experience with double-speed CD drives? (esp Toshiba 3401b)
Summary: Speedy CD-ROM?  I'm not seeing it!
Message-ID: <1993Dec31.202224.813@cs.wisc.edu>
Date: 31 Dec 93 20:22:24 GMT
Sender: news@cs.wisc.edu (The News)
Organization: U of Wisconsin CS Dept
Lines: 23


Does anyone have any experience with double-speed CD-ROM drives?  If
so, what sort of bandwidth are you seeing from the drive?

The reason I ask is that I recently purchased a Toshiba 3401b, which
is supposed to achieve 330Kb/s.  However, when I use "dd" to read from
the raw device, I get only about 200Kb/s.

Is anyone else getting better performance from a similar drive?  If
so, what sort of speeds do you see when you execute:

	dd if=/dev/cd0d of=/dev/null

Incidentally, the Toshiba is attached to an Adaptec 1542b card...

Thanks for any info,

Jon
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Jon Cargille		jcargill@cs.wisc.edu
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