27 Dec
2006
27 Dec
'06
9:20 a.m.
dwight elvey wrote:
I've been told that there are a few that don't
support the 720KB.
I'm not sure what tyhe difference is for the drive. The rpm isn't changed,
just that they use FM instead of MFM. It might be that they change the
size of the read data pulse or something.
It's not FM. The format commonly referred to as 720K is MFM (double
density), but at half the data rate of the HD format (which is also
MFM), and that's why the write currents are different and the disks are
different coercivities.
--
Pete Peter Turnbull
Network Manager
University of York