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romanon
October 15th, 2013, 02:17 AM
Hi, what hardware difference is between 360k and 1.2MB floppy drive? Is there any way to easily recognize them? Thanks

vwestlife
October 15th, 2013, 06:26 AM
Most 360K drives have a black faceplate while most 1.2MB drives are beige or white. However, that rule only works about 80% of time. There were some beige and white 360K drives, especially TEAC drives used in the Tandy 1000 series, and a few black 1.2MB drives, although those are much more rare. IBM put a star (*) on the faceplate of their half-height Ye-Data 360K drives (as used in the AT and later XTs) to differentiate them from 1.2MB drives (no star on faceplate). When in doubt, Google the drive's full model number and you should find some hits describing what density it is.

mbbrutman
October 15th, 2013, 06:36 AM
A 360KB drive is commonly referred to as "double density" and that is a reference to the magnetic media that it uses. A 1.2MB drive can use both "high density" and "double density" magnetic media. There is a difference in the amount of magnetic force required to write to the two different medias. And for these particular drives, there is a difference in the number of tracks per inch that the stepper motor can support. (Which also has an impact on the size of the read/write head.)

A good rule of thumb is to avoid rules of thumb. Look up your drive by its model number to determine exactly what it is.

And do some Googling. There is plenty out there about the differences already. You can learn even more.

Dwight Elvey
October 15th, 2013, 09:03 AM
If it is a PC 1.2M, it will be hard wired to 360RPM. With a drawing program,
make up a couple of disk you can stick to the flywheel or motor.
On one disk, divide the circle into 20 bars and spaces. Mark this one
1.2M.
Make another with 24 bars and spaces. Mark this one 360K.
Tape one to the drive and power it up. Use an older type florescent lamp
to see which type it is. ( assuming you have 60Hz ).
Dwight

MikeS
October 15th, 2013, 07:18 PM
If it is a PC 1.2M, it will be hard wired to 360RPM. With a drawing program,
make up a couple of disk you can stick to the flywheel or motor.
On one disk, divide the circle into 20 bars and spaces. Mark this one
1.2M.
Make another with 24 bars and spaces. Mark this one 360K.
Tape one to the drive and power it up. Use an older type florescent lamp
to see which type it is. ( assuming you have 60Hz ).
Dwight

15590

Chuck(G)
October 15th, 2013, 08:42 PM
That's not going to do much good if what you've picked up is a 96 tpi (720K drive) or a single-mode 1.2M drive (e.g. some Mitsubishis are that way) with no low-density mode--or 100 tpi drives...

Well, you get the idea. Using the drive part number as your guide is the safest route.

archeocomp
October 15th, 2013, 09:31 PM
I even have one TEAC with 80 tracks, but it is 720K (DD) only ;)