jude1977 wrote on 2024-07-12, 14:07:
only one of them seems to format and the other 9 won’t the brand are called Nashua
Nashua isn't a big brand in floppies like Dysan for example but also not a no-name. I have some of their floppies, in fact used and bought cheap, and they all work. It's possible that your floppies have been very poorly stored and might be moldy or something. There is no way to tell from outside, even when the box seems to be factory sealed, how the floppies were stored and if they are any good.
It seems I gave you a German version of FDFORMAT by accident, I should've zipped my working folder with English version. Sorry about that. But from the screenshot I can see it was trying to format track 79 and then failed during verification step. It might be due to floppies being bad, but also it's possible the drive you have has some head damage, or the current switch is not working properly. Which might make the write very weak or not work at all, but it would not affect reads much. So before you assume the floppies are indeed bad you should test them with a different drive. Preferably one that is known to be good.
BTW can you make a photo or two of your floppies? The actual media out of the envelope, not the box. It is possible some ebay sellers repack old floppies into genuine boxes to look like they've never been used, but these might not even be HD floppies at all. Usually 5.25" HD floppies will not have that friction ring in the middle, unlike DD ones. Maxell is I think the only company that had those, and only on some early production.
EDIT: This is the English version of the FDFROMAT.EXE, you can replace it if you want.