3com 3c556 Hurricane performance problems

Hello

I have a Dell Inspiron 8100 with a 3com 3c556 Hurricane ethernet
adapter. With w2k I get almost 10Mbytes/s when transferring files, but
with the linux 3c59x driver on kernel 2.4.18 it's only around
2-3Mbytes/s (tried both SMB and FTP) - is there something I can do to
unleash the power of the hurricane? ;)

lspci -vvv says this about my ethernet adapter:

---

02:06.0 Ethernet controller: 3Com Corporation 3c556 Hurricane CardBus
(rev 10)
        Subsystem: 3Com Corporation: Unknown device 6456
        Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV+ VGASnoop-
ParErr- Stepping- SERR- FastB2B-
        Status: Cap+ 66Mhz- UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort- >SERR- <PERR-
        Latency: 32 (2500ns min, 1250ns max), cache line size 08
        Interrupt: pin A routed to IRQ 10
        Region 0: I/O ports at e800 [size=256]
        Region 1: Memory at f8ffdc00 (32-bit, non-prefetchable)
[size=128]
        Region 2: Memory at f8ffd800 (32-bit, non-prefetchable)
[size=128]
        Expansion ROM at f9000000 [disabled] [size=128K]
        Capabilities: [50] Power Management version 2
                Flags: PMEClk- DSI- D1+ D2+ AuxCurrent=0mA
PME(D0-,D1+,D2+,D3hot+,D3cold+)
                Status: D0 PME-Enable- DSel=0 DScale=1 PME-

---

please tell me if you need more info (vortex-diag, mii-diag etc.). thank
you for your help in advance.

regards
nicola

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