[Coco] Can't copy real floppy to CoCo-SDC on a CoCo 2

[Darren A]

On Fri, Feb 27, 2015 at 12:15 PM, wrote:

> This issue is a floppy drive issue as I've removed the CoCo-SDC and
> replicated the same issue with real floppies. I changed disk controllers
> just to eliminate that as an issue. I reinstalled drive 1. It has no
> terminator and the DS jumper is set to D1. Same symptoms. I can read &
> write to each drive individually without issue, but the "BACKUP" command
> between the two drives (D0 & D1) fails with an "?IO ERROR". Ideas?
>


Have you tried it with different disks?  Maybe the disk you're trying to
read is defective.

There could also be a head alignment problem which doesn't affect the
central tracks of the disk (where the directory is) but results in failure
when trying to read the outside tracks during BACKUP.

- Darren