On 11/4/2024 1:38 PM, Fred Cisin via cctalk wrote:
>
Non-descript 5.25 DS/DD (they don't format as 1.2M disk using a 1.2
> 5.25"
> drive, so I'm pretty sure they are actual 360KB disks). That said, I
On Mon, 4 Nov 2024, osi.superboard via cctalk wrote:
from my experience, these
"Non-descript" are often the cause for
format errors. Look for high quality disk media like
Dysan 100 5.25 MD2D
2D/2D "BASF"
MD2-DD "Maxell" or
DS,DD from "3M"
Any Dysan disks are generally superior to most others.
Even Verbatim "Datalife" are substantially more reliable than generics.
(Verbatim, BEFORE "Datalife", were worse than generic)
Although, in the 1990s, generic disks had improved to the point where
they were usually almost as good as the worst of the brand name ones.
And certainly better than SOME brand name disks, such as "Wabash', and
some batches of "Elephant"
I used Elephant. Still have piles of them and they are all still
readable (and probably writable but I don't want to lose the data
they hold.)
In addition, these "Non-descript" disk
are most likely pre-formatted
by factory, so Degaussing is recommended or at least formatting on a
360k drive.
Since he is trying to write 360K images to them, in a 1.2M drive, he
should definitely NOT format them in a 360K drive!
Probably bulk erase, with a degausser, then do it again, then do it with
a different degausser?
If they still won't work (after eliminating drive as problem), then
staple them.
The biggest laugh I ever had was when we complained about a problem
writing floppies under UCSD Pascal on a Terak and their answer was to
buy Terak Brand Floppies.
bill