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5.25" MITSUMI Floppy Drive D509V5

Table of contents:

Oh yes, 5.25" floppy drives. A piece of technology becoming very rare now. Obsolete since the mid-90s!
Knowing today that this generation doesn't even know what a 3.5" Floppy disk is, imagine their reaction to these ones!


Disks

Now in case you're unfamiliar with these disks, they are basically a square shaped piece of plastic as thin as a CD.
Compared to the 3.5" disks, they don't have a metal slider protecting the tape, so they have to be placed in sleeves.
The middle is also hollow.

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Front side
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Back side.

Capacity

The absolute maximum a 5.25" disk can hold (in IBM format), is 1.2MB. Earlier 5.25" disks only used one side thus having a capacity of 360KB.
Not to worry though, this MITSUMI Floppy Drive can read both types of disks.
The common 3.5" disks you usually see has a maximum capacity of 1.44MB and has a max of 720KB if it's single sided.


Problems

Oh yep, that's right, if it's listed on this website it's gonna have some issues. Luckily it's only a minor issue.
My drive I ordered from FloppyDisks.com had a misalligned read head (most likely shipping damage).
All I had to do was take off the top cover push the head back a little so the reading head would line up in the gap of the motor.

Photo
Photo

Before that, I wasn't getting any kind of response at all and the computer wouldn't even recognise it.
Only signs of life I got out of it was a faint buzzing sound and that the motor was warm. I wasn't getting any spinning, any lights or anything.
But after moving the head back a little, it suddenly spins, is recognised, and the light blinks! Working great now!
Here's a video I did explaining the process:


Conclusion

I'd say this is the absolute best 5.25" drive you can get (as long as you find a working one).
It has jumper automation (still has DS0/DS1 jumper but normally you don't have to change that one).
The one I ordered from FloppyDisks.com seems to be in excellent condition. It's not even yellowed at all!
Therefore I rate this drive 5/5 because it works really well!.


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