A tale of two diskettes.

[Rick Ethridge]

I have a double 3.5 in 720k drive unit for my Coco 3 system. Can I use 1.44 meg floppies?

 

[Caluser2000]

As 720k disks yes. But the results may not be permanent or reliable.

 

[Chuck(G)]

I see lots of DSHD floppies formatted as DS2D in typewriters, word processors, etc. Most are at least 20 years old. I haven't seen that they're any less permanent than genuine DS2Ds.

 

[Stone]

If you want a few 3½" DSDD 720k disks I have a couple of varieties.

 

[jamesbeat]

There's a good article about this issue here:

http://www.retrotechnology.com/herbs_stuff/guzis.html

I used a few of them with my Atari ST - I got them for free, which was a big deal when I was young and disks were expensive!

I did get a couple of corruptions on these disks, and it happened often enough that I made sure I never put anything on them that I couldn't replace - stuff I knew my best friend had that I could re-copy from him if necessary.

I do remember thinking they were really cool though, because ST disks were usually blue, and these HD ones were black

Of course, this is only one data point - one drive and about ten disks, both manufactured over 20 years ago.