15 Dec
2007
15 Dec
'07
5:19 p.m.
Chuck Guzis wrote:
Would I be more-or-less correct if I assumed that the
bulk of hard-
sectored diskettes in use fell into two groups: 16-sector 5.25" and
32-sector 8"? I know that there are other physical formats, but I'm
wondering if that would have 90% coverage?
Jerome Fine replies:
For 5.25" diskettes, if you mean currently still in use,
then you are probably correct regarding 90% use of HD 5.25"
diskettes. But initially the use of 180K and 360K 5.25"
diskettes was probably 90% - did they use 9 sectors?
And as Tony stated, don't forget the RX50 5.25" diskettes
which used 10 sectors - if I remember correctly.
I suggest that what you really should do is to state the
percentage sales of DD (which cold be used both SS and DS)
versus HD (which were almost always used DS) diskettes for
any given year along with how many units were sold.
And then you might also want to look at the actual number
of floppy drives that were sold which are able to use a
given number of sectors.
Sincerely yours,
Jerome Fine
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