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Re: SCSI devices for a IIgs
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In article <wY6cnZRzD8heTIOiXTWJjA@comcast.com>,
Bill Garber <willy46pa@comcast.net> wrote:
>"Scott Alfter" <salfter@salfter.dyndns.org> wrote in message
>news:CTzTa.14691$Bp2.7692@fed1read07...
>> DVD-ROMs can be burned in ISO-9660 format as well as UDF. While a UDF
>> DVD-ROM definitely won't work, maybe an ISO-9660 or hybrid ISO/UDF
>> DVD-ROM would work. (An even stranger beast would be a DVD-ROM with HFS
>> or even ProDOS filesystems on it...you can do this with CD-ROM easily
>> enough, and as far as burning software goes, a DVD-R isn't much more than
>> a really large CD-R.)
>
>May I add that there is one other big difference. CDs are burned using a
>pinpoint IR light beam, where DVD is burned using a finer and much
>hotter UV beam. For the record.
That's a physical difference in the process. The software controlling the
burner doesn't need to concern itself with that detail...it's abstracted
away by the hardware. (FWIW, DVDs are read and burned with a red (visible)
laser, while CDs are read and burned with an infrared laser.)
>> Testing this would require a SCSI DVD-ROM drive, though...all of the
>> DVD-ROM drives I have are IDE.
>
>Come to think of it, I've never seen or heard of a SCSI DVD drive.
>I think I will go and search for one. ;-)
They exist (built a system with one a few years ago), but they're not at all
common. They're a bit more expensive (but SCSI always is more expensive),
and at least back then their speeds usually lagged behind what was available
in IDE. I suspect they've since caught up.
(The cheapest price that turned up on Pricewatch for a SCSI DVD-ROM drive was
$58 for a Pioneer U03S 6x drive. The fastest SCSI DVD-ROM that turned up
was a 12x from Toshiba (probably the same drive I used before); the lowest
price on that is $118. By comparison, the last IDE DVD-ROM drive I bought
was a 16x from BTC that cost $35 at Fry's; the lowest price given by
Pricewatch for a 16x IDE DVD-ROM drive is $26 (for a Pioneer, not a no-name).)
_/_ Scott Alfter
/ v \ salfter@salfter.dyndns.org
(IIGS( http://alfter.us Top-posting!
\_^_/ pkill -9 /bin/laden >What is the most annoying thing on Usenet?
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