[vortex-bug] transfer errors with 3C905C-TX-M

[Bogdan Costescu]

On Mon, 4 Sep 2000, Sergei Klioner wrote:

> corruption is always the same: 4 or 40 (octal) is added to the correct
> value of the byte. No error messages! The probability of error is
> between 10^(-7) and 10^(-8). The distribution of errorneous bytes and

How did you get this numbers ?

> their number is random and differs from transfer to transfer also for
> the same file. This happens with all drivers available to me: 3Com's
> 3c90x versions 1.0.0.c (standard for RH6.2) and 1.0.0.i (the latest
> version from the 3Com's web site), and 3c59x driver V.0.99H. Any ideas?

If you're using RH 6.2's default kernel (2.2.14-5), the 3c59x driver does
not support properly the 905C cards. You should upgrade to 2.2.16-3.
It might be a media selection problem, but the rate of failure (if correct
computed) is IMHO too low. Anyway, 3Com's drivers should get the right
media settings.
What is at the other end of the cable ? Do you know that your cable is
good ? Does ifconfig report errors ?

Sincerely,

Bogdan Costescu

IWR - Interdisziplinaeres Zentrum fuer Wissenschaftliches Rechnen
Universitaet Heidelberg, INF 368, D-69120 Heidelberg, GERMANY
Telephone: +49 6221 54 8869, Telefax: +49 6221 54 8868
E-mail: Bogdan.Costescu@IWR.Uni-Heidelberg.De