Re: SFD-1001 Problem

From: William Levak (wlevak_at_sdf.lonestar.org)
Date: 2006-12-30 06:55:09

On Fri, 29 Dec 2006, Andrew Wiskow wrote:

> Date: Fri, 29 Dec 2006 18:11:05 -0300 (ART)
> From: Andrew Wiskow <drewbrasil@yahoo.com.br>
> Reply-To: cbm-hackers@ling.gu.se
> To: cbm-hackers@ling.gu.se
> Subject: SFD-1001 Problem
> 
> Thanks for everyone's help with my VIC-1541 problem...
> :)
>
> I recently aquired an SFD-1001 drive, but I'm having
> problems with *it* now (not my lucky month with disk
> drives, I guess!)...
>
> The drive arrived with an SFD formatted disk in it.  I
> loaded the directory on that disk, and it listed fine.
> I loaded and ran a couple programs on that disk, and
> those worked fine.  However, when I tried to format
> one of my fresh 96TPI disks, the drive light lit for
> about 30 seconds, then the computer returned to a
> ready prompt, and the error light on the drive was
> lit.  Reading the error channel produced the
> following:  20,READ ERROR,00,00,0

20, READ ERROR means block header not found.  Sounds like the drive erased 
the disk, but then failed to write a new block.  The 00,00,0 should 
contain the track, sector, and drive number, in this case the beginning of 
the disk.

Do you have a working drive that is compatible.  If so, you could try 
using the good drive to see what is on the disks.


The error indicates that the head is near the edge of the disk.  If that 
is the case, Commodore drives have trouble resetting the head mechanism 
from there.  You may have to open up the drive and move the head manually.

Sometimes the Commodore drive test routine will reset the head.


wlevak@sdf.lonestar.org
SDF Public Access UNIX System - http://sdf.lonestar.org

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