50439

神经网络昆斯林的新闻组分类2006

Xref: cantaloupe.srv.cs.cmu.edu comp.sys.mac.misc:42499 comp.sys.mac.hardware:50439
Newsgroups: comp.sys.mac.misc,comp.sys.mac.hardware
Path: cantaloupe.srv.cs.cmu.edu!crabapple.srv.cs.cmu.edu!fs7.ece.cmu.edu!europa.eng.gtefsd.com!emory!swrinde!zaphod.mps.ohio-state.edu!cs.utexas.edu!uunet!decwrl!netcomsv!optimla!lex
From: [e-mail] (Lex van Sonderen)
Subject: Re: CD-ROM multisession
Message-ID: <[e-mail]>
Sender: [e-mail]
Nntp-Posting-Host: emerald
Organization: Philips Interactive Media of America
References: <[e-mail]> <1pgifo$[e-mail]>
Date: Mon, 5 Apr 1993 23:31:23 GMT
Lines: 19

In article <1pgifo$[e-mail]> [e-mail] writes:
>As I said "I know a multisession CD-ROM is necessary if you do more photos..."
>BUT what if it is just a writable CD-ROM drive and do a second "session"
>do you need one for that too?

If you write a second time to a CD you need to have multi-session capability to
read the second session.  Whether it is photos or just data or whatever.

Here is a simplified way of looking at it:
The first session has the directory structure burned at some tracks.  The
second session has a newer directory structure, but the first directory still
exists, because you cannot change, only add.  So if you put that in a 'normal'
drive and it will only look to the first directory and think it has found all
data.  Multisession kindof means that the drive will look for the last
directory written to the disc, older systems look only for 'the' directory, not
taking multiple directories into account.

Lex van Sonderen
Philips Interactive Media