Re: MD: Dataplay (small 500MB *multipurpose* discs) vs. MD

2000-08-13 Thread Leon


Hi,

the 3" CD-R isn't really new in Japan.  I believe it's been around for some
time - I've seen Japanese personal web pages on burning 3" CD-Rs from last
year. Put it in an CD-single adaptor, and (at least) some CD-R drives will
burn just as usual.

The MD disc was originally going to be the size of the 3" CD, but shrunk
further to bring it close to the dimensions of a cassette. Like with the CD,
Sony's size decision was made with regards to existing "spaces" (CD fits in
the "1DIN" European size dashboard stereo space).

On the other hand, Sony is involved in a 5cm (about 2"?) diameter MO disc:

http://www.world.sony.com/News/Press/23/00-0323/

One way to see this is that Sony doesn't see MD/MDdata as adequate for a
storage medium. It could really be the format's specifications that's
limiting progress.

Or you can say Sony's just doing what they've always done. They're also
being indecisive between large LCD panels and plasma display. ;)

Leon

 I just checked out the Dataplay web page (www.dataplay.com). They are
 pushing a new write-once, US $5.00-10.00 disc that looks like a 2/3
 size MD (to be available early 2001). They say it'll be used in
 cameras, mp3 players, computers, game devices, phones, etc.
 
 It looks great, but I have a basic question: Why hasn't this been done
 already with MD's? There is a high-capacity version, right? Is the
 write speed to slow?
 
 And why did SONY make their new Mavica use an entirely new 3-inch CD-R?
 The capacity is approximately the same as a standard MD -- and the CD-R
 is even a little larger, I think. The write speed can't be faster than
 an MD (both generally go up to 4X (600kpbs). What's the advantage of
 the CD-R? MD's are re-writable so many times, and can be made
 un-eraseable simply by moving the write-protect tab.
 
 I really hope to see these portable storage options expand from the
 current very expensive flash memory, but I'm left wondering about
 MD-sized MO discs.

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RE: MD: Dataplay (small 500MB *multipurpose* discs) vs. MD

2000-08-13 Thread RJ Kirkland


 I have seen the Dataplay discs and they are pretty well thought out.
My biggest complaint being that they are industry friendly, not consumer
friendly.
As for why MD was never pushed that wayThat's Sony for you.
On the technical side. MD can be written to at a present max of 2x in
CDR terms (300kbps) but that is the raw figure. When you take into
consideration
the compression of the input data (audio) it has a subjective speed of
upto 8x. The current system heads only support 1x raw/4x subjective.
That is becuase MD is optimagnetic-rewritable (because it is
magnetically written [modulated] actually). So the Mavica was designed
to use CDR becuase CDR can easily record at 8x raw speed.

Hope This Helps,
RJ Kirkland

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MD: Dataplay (small 500MB *multipurpose* discs) vs. MD

2000-08-12 Thread Greg Conquest


Hi all,

I just checked out the Dataplay web page (www.dataplay.com). They are
pushing a new write-once, US $5.00-10.00 disc that looks like a 2/3
size MD (to be available early 2001). They say it'll be used in
cameras, mp3 players, computers, game devices, phones, etc.

It looks great, but I have a basic question: Why hasn't this been done
already with MD's? There is a high-capacity version, right? Is the
write speed to slow?

And why did SONY make their new Mavica use an entirely new 3-inch CD-R?
The capacity is approximately the same as a standard MD -- and the CD-R
is even a little larger, I think. The write speed can't be faster than
an MD (both generally go up to 4X (600kpbs). What's the advantage of
the CD-R? MD's are re-writable so many times, and can be made
un-eraseable simply by moving the write-protect tab.

I really hope to see these portable storage options expand from the
current very expensive flash memory, but I'm left wondering about
MD-sized MO discs.

Greg

(sent from yahoo mail Sunday 2:10  pm JST; Sun 12:10  am CST; Sun 5: 
GMT (for tracking time to post))

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Re: MD: Dataplay (small 500MB *multipurpose* discs) vs. MD

2000-08-12 Thread Matthew Wall



  ===
  = NB: Over 50% of this message is QUOTED, please  =
  = be more selective when quoting text =
  ===

ok, here it goes again, dont take this the wrong way, but about once a month
a different web site talks about having a breakthrough new product that is
1/10 the size of normal cd's and can handle about 2 gig's plus (or this case
500 meg or so)  anyway how many have we actually seen manifested, ls 120,
iomega zip, iomega click.  i hate to say it but i just dont believe any of
these things any more.


- Original Message -
From: Greg Conquest [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Cc: [EMAIL PROTECTED]
Sent: Sunday, August 13, 2000 12:10 AM
Subject: MD: Dataplay (small 500MB *multipurpose* discs) vs. MD



 Hi all,

 I just checked out the Dataplay web page (www.dataplay.com). They are
 pushing a new write-once, US $5.00-10.00 disc that looks like a 2/3
 size MD (to be available early 2001). They say it'll be used in
 cameras, mp3 players, computers, game devices, phones, etc.

 It looks great, but I have a basic question: Why hasn't this been done
 already with MD's? There is a high-capacity version, right? Is the
 write speed to slow?

 And why did SONY make their new Mavica use an entirely new 3-inch CD-R?
 The capacity is approximately the same as a standard MD -- and the CD-R
 is even a little larger, I think. The write speed can't be faster than
 an MD (both generally go up to 4X (600kpbs). What's the advantage of
 the CD-R? MD's are re-writable so many times, and can be made
 un-eraseable simply by moving the write-protect tab.

 I really hope to see these portable storage options expand from the
 current very expensive flash memory, but I'm left wondering about
 MD-sized MO discs.

 Greg

 (sent from yahoo mail Sunday 2:10  pm JST; Sun 12:10  am CST; Sun 5:
 GMT (for tracking time to post))

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