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From: rtrigg@symantec.com (Roger Trigg)
Newsgroups: alt.cd-rom
Subject: Re: What is Multisession???????
Date: Mon, 7 Mar 1994 22:20:23
Organization: Symantec
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In article <2lfq9i$ldk@sndsu1.sinet.slb.com> mehran@laplaceatlanta.emna.slb.com (M. Mikail) writes:
>From: mehran@laplaceatlanta.emna.slb.com (M. Mikail)
>Subject: What is Multisession???????
>Date: 7 Mar 1994 18:03:30 GMT


>What exactly is a "Multisession" CD-ROM drive?  Why would I want my CD-ROM 
>drive be multisession?  I was told by a sales rep at Micocenter that a 
>double-speed CD-ROM drive is necessarily multisession.  Is that true?  I am 
>skeptical of things that not-so-knowledgable sale people tell me.

Multisession drives are drives that can read data that was recorded in two or 
more sessions. For example take a Kodak Photo CD, you can take in some slides 
and have say 30 slides put on a disk. Then later you can take in some more 
slides and the same disk and have the addition slides put on in a second 
session. If you don't have a multisession drive then the second session's 
information will be unreadable for you.

In answer to the second part of your question (double speed always 
multisession), I don't know 100%, but it sounds like BS to me. It may be that 
in practice all double speed drives ARE multisession just because double speed 
drives only came out after it became obvious that everyone wanted to go for 
multisession. (Personally though, I would be cautious and always ask rather 
than assume). 

BTW, since you're in the market for a double speed, I would strongly recommend 
the Toshiba 3401. I have one at home and we have several at work, they are 
very fast, dependable, and no more expensive than the competition. (Make sure 
you don't pay over $350, and you should be able to find something around 
$300-325).

>What is the performance difference between a CD-ROM drive 
that has 32K RAM >buffer vs. one with 64K RAM buffer?

This is another case where I don't know the "real" answer. But I'm not sure 
that it really matters, since they're both going to be pretty poor. You want 
performance, get some caching software.


Hope that helps,
Roger Trigg (rtrigg@symantec.com)


>Thanks in advance
>Mehran Mikail

>e-mail: mehran@atlanta.emna.slb.com
 

