29 Apr
2010
29 Apr
'10
4:03 a.m.
From: "Chuck Guzis" <cclist at xxxxx.com>
Although I do have an odd case before me. The subject
floppies are
from a Schlumberger wafer tester. What was sent were hard-sector (32
sector) floppies, but the data is definitely soft-sector (i.e. the
sectors don't line up with the sector holes and use address marks
(i.e. A1 with a missing clock) to demarcate sector headers and
sector data.) My guess is that the drive was set up to handle hard
sectored media., so that the controller still sees only one index
pulse.
Some years ago I came across an 8" Norsk Data floppy. The analyze software
called it a IBM 374x, but the data I read was gibberish.
A closer look showed that track 0 was indeed like a 3741. One file was
present. OK so far.
It then showed, that this 1 file was formatted as a normal MS-DOS directory.
I managed to dump this directory to a DOS formatted floppy, and voila, the
data was saved.