4 Jun
2012
4 Jun
'12
10:04 a.m.
On Mon, 4 Jun 2012, Chuck Guzis wrote:
To some extent, the problem also exists in 3.5"
drives. Original 3.5"
drives, such as the Sony 0AD, recorded with a track spacing at 67.5 tpi,
rather than today's 135 tpi. Fortunately, most people just want to read
the old media, not write it.
Some of those early SOny drives spun at 600 RPM, and used a 500K dtr,
resulting in the same capacity and diskette format [as the 300RPM/20Kdtr),
but complete hardware incompatability.
The Epson Geneva PX-8 used a 40cylinder 3.5"; I have an Epson 67.5tpi
drive.
3.5" had a few recording deviations - Barium-ferrite disks and 2.8M,
floptical, etc.