[Coco] DriveWire problem

Steven Hirsch snhirsch at gmail.com
Tue Feb 16 18:02:30 EST 2016

On Sun, 14 Feb 2016, Aaron Wolfe wrote:

> On Sun, Feb 14, 2016 at 5:07 PM, Steven Hirsch <snhirsch at gmail.com> wrote:
>> The DW GUI is showing pairs of messages:
>> Sun Feb 14 2016 16:53:47.362  WARN   DWProtocolHandler   dwproto-0-9
>>    Timed out reading from CoCo in OP_WRITE
>> Sun Feb 14 2016 16:53:47.367  WARN   DWProtocolHandler   dwproto-0-9
>>     OP_WRITE took 286ms.

> This means the server is waiting for data from the CoCo and not getting it
> within the expected time period.  Some operations like writing involve a
> few back and forth exchanges between server and coco.  If either side takes
> longer than ~250ms iirc then the other side is supposed to assume failure,
> which is what the server is warning about.  It really shouldn't happen.
> So... first thing I'd check is the serial cable itself for anything loose,
> etc.  Some people have had this kind of result when the cable was just too
> long.  OP_WRITE is one of few times the coco actually sends a lot of bytes
> in a row over the wire so it can reveal a more general problem.

Give the man a prize!  I bought a new name-brand FTDI cable, swapped out 
my $5 no-name flea market adapter and life is now good.  I copy data to 
the DW volume to my heart's content.  The original was probably a 
counterfeit FTDI (as so many cheapie adapters tend to be) and likely 
succumbed to electro-migration.

Thanks, Aaaron.


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