25 Nov
2001
25 Nov
'01
3:10 p.m.
Does anyone know if there is a way to tell which is which by looking at the drive?. FTM
the 720k vs 1.44Mb 3 1/2" drives. Thanks in advance...
R..
25 Nov
25 Nov
6:51 p.m.
On Sun, 25 Nov 2001, SchiskaMeister wrote:
Does anyone know if there is a way to tell which is
which by looking
at the drive?. FTM the 720k vs 1.44Mb 3 1/2" drives. Thanks in
advance...
R..
There are not usually obvious differences between a 360k abd a 1.2mb
drive. The best method is to check make/model number on:
http://theref.aquascape.com
which has a fairly complete floppy drive listing. Alternatively, do a
web search for THEREF43.ZIP and download it. It covers rather more than
just floppies.
WRT 720k and 1.44mb, my usual check is to prop open the door and look
into the innards of the drive. On the `floor' on the left, there are
normally two small vertical pins present. They are switch actuators for
disk present and for writeprotect. If there is a similar pin on the
`floor' on the right it is a 1.44mb drive.
- don
26 Nov
26 Nov
12:31 p.m.
If you flip open the door and see two pins one on the right front corner
and one on the left front corner you have a high density drive. So if
you see only one pin you have a 720. These are the pins that go into
the holes at the top of the 3.5 FD.
----- Original Message -----
From: "SchiskaMeister" <schiska(a)mindspring.com>
To: <classiccmp(a)classiccmp.org>
Sent: Sunday, November 25, 2001 8:10 PM
Subject: 360k versus 1.2Mb floppy drives...
Does anyone know if there is a way to tell which is which by looking at
the drive?. FTM the 720k vs 1.44Mb 3 1/2" drives. Thanks in advance...
R..
1:12 p.m.
If you flip open the door and see two pins one on the
right front corner
and one on the left front corner you have a high density drive. So if
you see only one pin you have a 720. These are the pins that go into
the holes at the top of the 3.5 FD.
Hmmm. None of my 360K nor 1.2M drives have pins to sense density.
If there is an asterisk ('*') embossed on the front panel of a
5.25" drive, then it is a relatively late model 360K.
If there is NO asterisk ('*') then is an older 360K, OR a 1.2M, OR a later
360K from a non-complying company that thought that it was pretty stupid
to go along with IBM's grand idea of putting the identifying mark on the
new versions of the model that previously was unmarked (putting an
asterisk on the NEW type of drive might have made sense).
If the 5.25" drive turns at 360 RPM, then it is a 1.2M.
If it turns at 300 RPM, then it is a 360K, or "360K mode" in of the 1.2M
drives that switched speed instead of switching data transfer rate (as IBM
did).
300 RPM was also used for 720K 5.25" drives. (not used on IBM, except for
the JX model)
Is there any connection to the "density" pin?
To summarize:
look up the part number.
BTW, for 3.5", not all drives used "pins". Some used photocells.
--
Grumpy Ol' Fred cisin(a)xenosoft.com
8272
days inactive
8273
days old
3 comments
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cisin＠xenosoft.com -
donm＠cts.com -
jrkeys＠concentric.net -
schiska＠mindspring.com