nwc@galileo.shearson.com (Nick Christopher) (12/11/90)
Remember when: Hole punch turned a single sided Apple II floppy into a double sided? A drill bit turned a 720 KB 3.5 inch disk into a 1.44 MB 3.5 inch disk? What turned a single sided OD into a double? Those of you that have them - have you looked at them? Might we all have double sided OD and just not know it ? 8^) -- \n Nicholas Christopher (212) 464-3837 Internet: nwc@sisyphus.shearson.com UUCP: ...!uunet!slcpi!galileo!ronin!nwc
coco@cbnewsl.att.com (felix.a.lugo) (12/11/90)
In article <NWC.90Dec11080736@galileo.shearson.com>, nwc@galileo.shearson.com (Nick Christopher) writes: > > Remember when: > > Hole punch turned a single sided Apple II floppy into a double sided? > > A drill bit turned a 720 KB 3.5 inch disk into a 1.44 MB 3.5 inch disk? > > What turned a single sided OD into a double? Those of you that have them - > have you looked at them? Might we all have double sided OD and just not > know it ? > > 8^) > -- > Nicholas Christopher (212) 464-3837 I haven't seen a double-sided OD yet, but it is my guess, after fooling around with my machine and an OD, that the only thing missing from the current cartridges is the optical media on one of its sides (the shinny surface on the bottom of the OD). Again, it is my guess that Canon designed it's OD with double-sidedness (if there's such a word) in mind, but the cost of producing the double-sided cartridges was a bit too high (at the time). Note again, these are only guesses. If someone actually knows about this, please comment ... One question I've always wanted to know is why they designed the drive so that the read/write laser head was sitting on the bottom of the device. All these dust problems we keep hearing about could have been prevented (decreased would be appropriate), since the laser head would be pointing down and dust would not collect on it. I wonder if it is possible to "flip" the drive on its head! In this case the OD cartridge would be exposed to dust, since now it would have its media open but pointing up. Anyway, cartridges are easier to clean than the laser head. Food for thought. Have a good day! _____________________ Felix A. Lugo coco@ihlpb.att.com att!ihlpb!coco
tempest@walleye.uucp (Kenneth K.F. Lui) (12/12/90)
In article <NWC.90Dec11080736@galileo.shearson.com> nwc@sisyphus.shearson.com writes: > What turned a single sided OD into a double? Those of you that have them - >have you looked at them? Might we all have double sided OD and just not >know it ? > > 8^) I hope that by your smiley, you're kidding. If not...all NeXT ODs are single sided. It's very obvious if you look at the disk on both sides. One side--the one that's supposed to be the bottom--reflects light and makes a rainbow pattern ala CDs and the top side doesn't. The bottom side contains MO material that are divided into 16 sector slices. The top contains no MO. Ken ______________________________________________________________________________ tempest@ecst.csuchico.edu, tempest@walleye.ecst.csuchico.edu,|Kenneth K.F. Lui| tempest@sutro.sfsu.edu, tempest@wet.UUCP |________________|
moose@svc.portal.com (12/13/90)
In article <NWC.90Dec11080736@galileo.shearson.com> nwc@sisyphus.shearson.com writes: > >Remember when: > > Hole punch turned a single sided Apple II floppy into a double sided? And everyone lost a lot of data because disk manufacturers produced single sided disks from bad double sided disks. > > A drill bit turned a 720 KB 3.5 inch disk into a 1.44 MB 3.5 inch disk? Never worked right. > > What turned a single sided OD into a double? Those of you that have them - >have you looked at them? Might we all have double sided OD and just not >know it ? No, there is only material on one side of my disk. Besides, trying to abuse disks has always resulted in lost data for me and everyone I know. When it was putting games on disks, or a coplete PD collection, then it was one thing. But when it is all of my backups of source code, News archives, Every sound I have deemed worthy of keeping, is a couple of hundred dollars to much to pay for a an additional 256Meg? -- Michael Rutman | moose@svc.portal.com Cubist | makes me a NeXT programmer Software Ventures | For Your Eyes Only Public Key