>On 100MBps, I was able to get 3.8MB/s straight to disk.
>Now speed is only about 50KB/s. :(
>
>If it's of any use, I'm using full-duplex port. If I don't compile my
>NIC driver (de4x5) with fdx support, my speed also drops to about
>50KB/s. Suspicios?!
This is symptomatic of a driver trying to operate at half-duplex while
the card and the device at the other end of the wire are trying to
negotiate at full-duplex. What happens is that the driver, while trying
to work in half-duplex mode, considers the full-duplex traffic that it
sees to be collisions, and backs off packet transmissions accordingly.
Hence the slow speed.
davez
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Dave Zarzycki Student
Intern San Jose State University
Apple Computer, Inc. dzarzyck@email.sjsu.edu
zarzycki@apple.com zarzycki@ricochet.net
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