Ressurecting FDDs (was Original IBM PC (was Re: Prices to pa

From: Max Eskin <maxeskin_at_hotmail.com>
Date: Mon Jun 1 17:41:35 1998

What exactly does alignment entail? What part is getting misaligned?
Does this happen to any other type of drive (CD-ROM, HDD,etc.)
>> > It's better to get the right alignment disk, though
>> >
>> With the current price of fdds so low, it's hard to justify buying
something
>> that I would rarely use.
>
>Probably true for PCs, although I've found _new_ cheap fdds to be
>misaligned. I check them befroe installation, you see.
>
>Definitely untrue for classic computers :-), where you either want to
>keep as many parts original as possible, or need a floppy drive that's
no
>longer made e.g. 80 track 300 rpm 5.25". Yes, some 1.2Mbyte drives
_can_
>be kludged to rotate slower, but it's not always obvious what to do.
And
>service manuals for cheap fdds are not available.
>
>> > Are you sure? Putting 12V where 5V should go is a bad idea, and I
wasn't
>> > aware that Atari drives had the connector backwards.
>> >
>> Yeah this is pretty well documented in the Atari threads. This isn't
true for
>> all brands however but I've never heard of any voltage conflicts.
It's a 4 pin
>> connecter and I wasn't aware of it also having 12v available on that
connecter.
>> Apparently most fdd brands will work 720 or 1440 but HD is not
available
>> without a modification, I just got unlucky with the one I bought.
>
>The standard pinout of the 4 pin power connector (both 5.25" and 3.5"
>types) is ground on the middle 2 pins and +5V, +12V on the outside 2.
>Some 3.5" drives (but by no means all!) are +5V only, and the +12V pin
is
>unused. My ST is hard to get to, and I don't have a service manual, so
I
>can't check to see what it does.
>
>> lwalker_at_interlog.com
>
>-tony
>
>

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Received on Mon Jun 01 1998 - 17:41:35 BST

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