WTB: 8" floppy

From: Richard Erlacher <edick_at_idcomm.com>
Date: Fri Jun 29 21:23:45 2001

The old (1981-82) DAVONG hard drives for use with PC's came packaged together
with a WD 1100-series chipset based HDC that talked some protocol specific to
that device, and IT was also equipped with similar connectors, i.e. connectors
that could be plugged wrongly if one didn't pay attention, in that one connector
was the standard hard drive power connector, yet the other was intended for the
controller, and had a negative 12V on it where something else went. You could,
conceivably, hurt something if you didn't pay attention to the wire colors.
However, since it wasn't intended that you get into the box ...

Dick

----- Original Message -----
From: "Fred Cisin (XenoSoft)" <cisin_at_xenosoft.com>
To: <classiccmp_at_classiccmp.org>
Sent: Friday, June 29, 2001 5:53 PM
Subject: Re: WTB: 8" floppy


> On Fri, 29 Jun 2001, Tony Duell wrote:
> > One 'nasty' relates to the Archive Sidewinder, a QIC tape cartridge
> > drive. This thing has a 4 pin power connector identical to the ones on
> > 5.25" floppy drives, etc). Ground on the middle 2 pins, +5V where you'd
> > expect it, too. But the other outside pin is +24V, not +12V. I am told
> > that some Suns used this drive and had a special power cable for it
> > carrying the right voltages. Get then mixed up when assembling the
> > machine, and you might plug +24V into a hard disk expecting +12V. The
> > results, apparently, are not pleasant.
>
> Another similar nasty:
> I have a 3.25" drive that uses the same connector as a 3.5" drive, except
> that the +5 and +12 pins are reversed!
> Fortunately, the 3" drives that I have use the same connector and pinout
> as 5.25". (which seems to be standardized)
>
> --
> Grumpy Ol' Fred cisin_at_xenosoft.com
>
>
Received on Fri Jun 29 2001 - 21:23:45 BST