9 Sep
2006
9 Sep
'06
8:26 a.m.
On Friday 08 September 2006 17:53, you wrote:
On 9/8/2006 at 5:23 PM Patrick Finnegan wrote:
Actually it's not read only. It's just used that way most of the time.
I'm using a couple of drives from a cluster controller. I had to figure out
how the 2.4 meg worked...
They have a two speed spindle 360/180 rpm and use 500kbit mfm just like
8" dd disks.
2.4 meg. only works on "microcode" disks though. And they are pretty scarce.
joe lang
FWIW, I tried hooking one of these up to a
catweasel 3 in a PC, and
while it could read "1.2MB" floppies just fine, I couldn't get Tim
Mann's catweasel utilities to recognize any MFM or other encoding on
the data stream that the catweasel card was reading off the 2.4MB disks
I've got (which are IBM 3174 microcode disks).
A Catweasel histogram of a track of one of these might shine a little light
on the recording technique used. Could be CGR or even a flavor of RLL.
But isn't this drive on the 3174 read-only?
Cheers,
Chuck