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Date:      Thu, 8 Jul 1999 00:58:47 +0900 (JST)
From:      ohashi@mickey.ai.kyutech.ac.jp (Takeshi OHASHI)
To:        ken@plutotech.com
Cc:        garbanzo@hooked.net, dmiller@search.sparks.net, akiyama@kme.mei.co.jp, freebsd-hackers@FreeBSD.ORG, ohashi@mickey.ai.kyutech.ac.jp
Subject:   Re: DVD-ram
Message-ID:  <199907071558.AAA02586@atohasi.mickey.ai.kyutech.ac.jp>
In-Reply-To: Your message of "Wed, 7 Jul 1999 14:36:12 JST". <199907070536.XAA88983@panzer.kdm.org>

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ken>>> I am a beta tester of the new od driver. It almost works fine on some
ken>>> beta testers system, but we cannot redistribute without Mr. Akiyama's 
ken>>> permit.
ken>>
ken>>Of course.  Well, if he doesn't mind, I'd like to take a look at it at some
ken>>point.

He is preparing the review version of od-driver. Please wait some days.

ken>>> I have a new question. If od driver is needless, why cd and da drivers 
ken>>> are sepalate yet? Only difference is TOC ioctls, isn't it?

ken>>It's true that the read/write interfaces of the two drivers are very
ken>>similar, but there are a number of other differences.  They probably could
ken>>be combined with some difficulty, but then there are booting concerns (if
ken>>everything is a DA device, how can you make sure you aren't booting off a
ken>>CDROM drive?), major numbers, and device names to think about as well.

Thank you for your answer. 

I think this situation is like as OD devices. Some DVD-RAM/MO/PD
drives are recognized as DA and others are CD. For example, A PD media
is used as a DA on PD drives. The PD media is used as a CD on DVD-RAM
and DVD-ROM drives. It is very confusing. Sometime we want to disable
booting from these devices.

The reason why we want od driver.
--
Takeshi OHASHI
ohashi@mickey.ai.kyutech.ac.jp
ohashi@jp.FreeBSD.ORG


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