3 Jun
2012
3 Jun
'12
5:33 p.m.
On 3 Jun 2012 at 17:12, Fred Cisin wrote:
Yes, the coercivity of 5.25" is not very
forgiving! HD diskettes used
for 360K tend to self-destruct rather soon. Whereas the 600 Oersted V
~730 of 3.5" is arguably within range for non-critical use.
On the other hand, I've done jobs where the lot included HD 5.25"
floppies recorded at 250K mixed in. (I think the last one was from a
Kaypro written more than 20 years ago). Surprisingly, they mostly
read just fine. I suspect that they were written on previously
unused media and managed to hang on. Only one showed non-recoverable
errors.
Did anyone ever make a 96 tpi drive with a selectable-width tunnel-
erase for writing 48 tpi formats? It would seem to be a practical
thing to do, but I don't recall ever seeing such a beast.
--Chuck