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From: "Chris Testa" <test...@worldnet.att.net>
Subject: Is DVD Supported???
Date: 1999/01/07
Message-ID: <773h78$78d@bgtnsc03.worldnet.att.net>#1/1
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I have read the Red Hat 5.2 Hardware Specifications and it says that DVD is
not currently supported.  Does anyone know if this is true, and if so are
their any places where I can get drivers?

Thanx,
Chris Testa

From: "Christopher J. Mark" <cjm...@wam.umd.edu>
Subject: Re: Is DVD Supported???
Date: 1999/01/08
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To: Chris Testa <test...@worldnet.att.net>
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Good News and Bad News.

DVD is not supported, per se.
The good news is that a DVD-ROM drive (at least my SB Dxr2) is
recognized as a plain IDE CD-ROM drive, so you can install from it,
mount it, etc. You just can't use the DVD capabilities. 
-- 
Christopher J. Mark
Mathematician, Tutor, and Webpage designer
http://www.math.umd.edu/~cjm    
"Time flies like an arrow, but fruit flies like a banana."

From: Rick Moen <rick...@linuxmafia.com>
Subject: Re: Is DVD Supported???
Date: 1999/01/11
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Chris Testa <test...@worldnet.att.net> wrote:
: I have read the Red Hat 5.2 Hardware Specifications and it says that DVD is
: not currently supported.  Does anyone know if this is true, and if so are
: their any places where I can get drivers?

When Red Hat says something is "not supported", this should be understood
in context.  It means that they haven't prepackaged support for the item
in question to the extent of being able to stand behind it and offer
technical assistance.  Many things are possible with Linux that are not
"Red Hat supported", and many pieces of hardware have drivers that are
not so listed on Red Hat's supported hardware list.

Please note that the above is _not_ intended as a slur against Red Hat
Software.  That's a perfectly sensible company policy.

Support for DVD must be broken down into parts:

1. Recognising the drive as a valid SCSI or ATAPI device.  Not a problem.

2. Recognising the filesystem.  DVD drives can read CD-ROM disks.  These
   are of course not a problem.  The DVD media might be regular CD-style
   ISO9660 filesystems (not a problem), but are much more likely to use
   the DVD-specific "UDF" (universal disk format) fileystem, defined by
   the Optical Standards Technology Association as a subset of the 
   ISO 13346 standard.  See: http://www.osta.org/html/ostatech.html
   A Linux filesystem driver for UDF has been developed, and is available
   at http://trylinux.com/projects/udf/   See also
   http://www.bitwizard.nl/udf/ and http://www.rpi.edu/~veliaa/linux-dvd/

3. Reading and playing MPEG (video) streams stored on the filesystem.
   This is problematic, and not yet supported, because of very heavy
   encryption used on such files.  Please note that _all_ such files
   will be visible on UDF filesystems to the extent of seeing that there's
   a file there:  Displaying it's another matter.

-- 
Cheers,                   The cynics among us might say:   "We laugh, 
Rick Moen                 monkeyboys -- Linux IS the mainstream UNIX now!
rick (at) linuxmafia.com  MuaHaHaHa!" but that would be rude. -- Jim Dennis

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