Buy 400k and 800k disks

Discussion in 'Apple Collectors' started by Ih8reno, May 16, 2014.

  1. Ih8reno macrumors 65816

    Ih8reno

    Joined:
    Aug 10, 2012
    #1
    I'm looking to use some software on my new to me Macintosh 512k but need older floppies to do so. Anyone know where I can find these and if I can program them on a newer Macintosh powermac 6500.
     
  2. tevion5 macrumors 68000

    tevion5

    Joined:
    Jul 12, 2011
    Location:
    Ireland
    #2
    You can often find 800k disks on eBay in various formats. 400k disks are harder to come by however. And yes, your 6500 will write 800K disks just fine. Using disk copy 4.2 it can also write 400k MFS images even up to Mac OS 9.2.2. I assume your 6500 is running Mac OS 7.X. That has semi 400k support built in. System 6 and before have full.
     
  3. Ih8reno thread starter macrumors 65816

    Ih8reno

    Joined:
    Aug 10, 2012
    #3
    Buy 400k and 800k disks

    Actually it's running 9.2.2 with os9 helper. Been looking for disks and come up with nada so far. Maybe easier to buy a premade disk from a website I found that sells system/game disks.
     
  4. tevion5 macrumors 68000

    tevion5

    Joined:
    Jul 12, 2011
    Location:
    Ireland
    #4
    Well resuemyclassicmac is a great site alright, but 800k disks are easy to find in packs of 10 or 20 even here in Ireland. It's just great to have the freedom to write you're own. Is your 512K an original or a 512Ke? It definitely has a 400k I mean? 400k image can only be written blind in os 9. You can mount them. I use my pm8600/250 running Mac OS 9.2.2 to write 800k disks for my 512Ke. I also run an appleshare server from my 8600 and access it on my 512Ke. I highly recommend this, it gives the 512K much more flexibility. Just get two localtalk adapters and use the workstation installer disk 1.1 for the 512K.
     
  5. Ih8reno thread starter macrumors 65816

    Ih8reno

    Joined:
    Aug 10, 2012
    #5
    So far no luck on eBay and amazon for Canada. Any links for companies online that ship them? It's a 512k
     
  6. Ih8reno thread starter macrumors 65816

    Ih8reno

    Joined:
    Aug 10, 2012
    #7
    That's great thanks, now I have to figure out which I should get. I think my external drive is 800k but the macintosh has 400k
     
  7. tevion5 macrumors 68000

    tevion5

    Joined:
    Jul 12, 2011
    Location:
    Ireland
    #8
    Well you can boot from an external drive. I boot my 512Ke from external usually myself. You'll want 800k disks for bigger games and later operating software. 800k disks hold more of course but are also much easier to manage. They are fully supported by the more modern OS 9.2.2 and disk copy 6.3.

    ----------

    I think 800k disks can also be formatted to 400k by selecting "single sided" during initialisation so they are again more useful.
     
  8. Ih8reno thread starter macrumors 65816

    Ih8reno

    Joined:
    Aug 10, 2012
    #9
    Is there no way I can use my regular floppy disks?
     
  9. David Schmidt macrumors 6502

    David Schmidt

    Joined:
    Aug 22, 2006
    Location:
    Southeastern USA
    #10
    What do you mean by "regular?" You should not use HD media for 800k or 400k disks. There are those that have had success with it, but far more have not. It essentially depends on your specific drive if it will work or not. If you get DD media, you can use that as either 400 or 800k; as tevion5 says, it's just down to single- or double-sided formatting, which is decided by your OS.
     
  10. Ih8reno thread starter macrumors 65816

    Ih8reno

    Joined:
    Aug 10, 2012
  11. Nermal Moderator

    Nermal

    Staff Member

    Joined:
    Dec 7, 2002
    Location:
    New Zealand
    #12
    The answer's the same; you shouldn't use HD disks.
     
  12. Anonymous Freak macrumors 601

    Anonymous Freak

    Joined:
    Dec 12, 2002
    Location:
    Cascadia
    #13
    Short form:

    Single-sided (400K) and double-sided (800K) disks use the same magnetic media inside the disk. On the very oldest single-sided disks, it may have only been usable on one side, but by the time double-sided disks had taken over, most media, even that sold as single-sided, was actually double-sided. Thus, you can format any 800K disk as single-sided just fine.

    Note that on SOME single-sided drives, the pad that touches the "back" of the disk may have deteriorated far enough by now that if you use an 800K disk in a 400K drive long enough, that disk might not be able to be used an an 800K disk again. (The "back" side of the disk material might have enough wear from the broken-down pad on the drive that it is physically scratched.)

    High-Density (1.4 MB) disks, on the other hand, use a different magnetic media than the older 400K and 800K disks. It is possible to reformat an HD disk as an 800K or 400K disk (or vice versa,) but it is not a good idea. The differences in magnetic coatings make it very unreliable. And once you use a disk in the "wrong" format, it becomes unreliable even if you reformat it back to its original format.

    I've done this when I had to move a file and didn't have an 800K disk available, but I made sure not to use that floppy disk again.
     
  13. harrymatic macrumors 6502

    Joined:
    Dec 30, 2013
    Location:
    United Kingdom
    #14
    I did an experiment using HD disks as DD with the tape over the window a few years ago. I filled up the disks with files, tested them and left them. I tried them again recently and they're still fine. It's been 3 years now. The disks were nothing special, just regular Imation HD diskettes.
     
  14. Anonymous Freak macrumors 601

    Anonymous Freak

    Joined:
    Dec 12, 2002
    Location:
    Cascadia
    #15
    Writing once and letting them sit probably won't have a problem - but regularly reading/writing/erasing/re-writing will likely shorten their lifespan considerably.
     

Share This Page