[Coco] FD-50X Drive manuals

[Bill]

I have 3 separate drives (a FD-500 and (2) FD-502s). 

I have 2 controllers (a FD-500 and a FD-502)

I have 2 cables (a flat ribbon cable and a rolled shielded cable)

I only have 1 computer (a 26-3127 Coco2).

Regardless which controller I use, or which cable I use, the result is the
same.

Two of the three are FD-502. Between them, there is (1) FD-502 controller,
one flat ribbon cable, and a round shielded cable. The drives act like this
(regardless of which controller is used, 500 or 502, or which cable is
used): When the DSKINI0 command is given, the drives "click" through each of
the 35 tracks slowly, but instead of returning to the beginning and doing it
again quickly to verify, they just spin a few seconds and display an ?IO
ERROR

The third is a FD-500 w/controller, but no cable. I've been using the cable
from the first 502 (a ribbon cable). The drive acts like this (again,
regardless of which controller is used, 500 or 502): When the DSKINI0
command is given, the drive "clicks" through 18 of the 35 tracks slowly, but
then it stays in the same place for 4 more "clicks", and displays an ?IO
ERROR.

Unfortunately, I don't have any to test anything else.

> -----Original Message-----
> From: coco-bounces at maltedmedia.com [mailto:coco-
> bounces at maltedmedia.com] On Behalf Of Joel Ewy
> Sent: Saturday, March 07, 2009 10:12 PM
> To: CoCoList for Color Computer Enthusiasts
> Subject: Re: [Coco] FD-50X Drive manuals
> 
> If 3 different drives fail in exactly the same way, I might start to
> suspect a different part of the system, like the cabling (the
> connectors, the cables themselves, or the orientation in which they're
> plugged in), the power supply, or the controller.  Do you have a good
> way to test out those other pieces?
>