🚀 go-pugleaf

Brandon S. Allbery (bsa@kf8nh.wariat.org) wrote:
: Also sprach steve@g6vju.demon.co.uk (Steve Wyles) (<D3qtDy.Hu@g6vju.demon.co.uk>):
: +---------------
: | 	The symptoms show up as a reduction in serial io speed when there
: | is any disk activity either to the internal IDE or external SCSI drive,
: | this manifests as a significant retrying of TCP/IP packets over my dial-up
: | slip link to my provider and also to a local machine using PPP under KA9Q.
: +------------->8

: It's rather worse than that:  since somewhere around 1.1.70 disk activity
: preempts *everything* (the system just plain *stops* until the disk I/O
: completes).  Given that this coincided with the appearance of spurious errors
: from by BT445C, I suspect it also interacts rather badly with VLB disk
: controllers.


Well, I have a BT445S (older), but haven't seen problems with it so far...
currently using 1.1.90.  (Config : 486 Dx2/66 + VLB )

Anyway, i'm also victim, on my other computer (a 386 Sx40) of troubles
with serial I/O , since 1.1.8? ... Returning to 1.1.72 cured the problem.

I'm not sure this a to do with disks. On this computer I have a 120 Mb Ide
& 2 SCSI disks, connected to a future Domain Tmc 850 (Yes, the old one, 8bits)

I have 2 28.8 Vfast modems, one external on & 16450, the other internal
(whith a 16550A built in)

When I Send on the external, and receive on the internal, everything is OK,
full speed... And, of course, as i send & receive on the same computer,
*THERE IS* disk activity...

When I Receive on the external, and send on the internal, I've got lots of
errors. Typical, with Zmodem : CRC error every 5 Kb
Even with lower speed (14.4, 9600 ..) I have the same problem.

As I Said earlier, with 1.1.72 it's ok...

--
Yann Dupont - Universite de Nantes               : dupont@unantes.univ-nantes.fr
            - home, sweet home (cafard naum BBS) : myst@cafard.freenix.fr