> Point 3/5: Am not sure whether u got the figures correct. But on my
> win-win LAN, with 10 Mbps cards we get an effective rate of 3-4 Mbps
> with intel Pros. R u sure about the lin-lin rates ? How did u go about
> measuring this performance ? I am interested, mayb my calculations were
> wrong !!

To throw more confusion onto the whole setup, when I used intel 100M cards
over a switch, I could easily get upto 4MB/sec data transfer for large
files. The same machines with Compex cards using some wdxxx chipset would
give 300k under linux, but around 2MB under windows (The linux driver was
surely faulty). A RealTek rtl8139(or 29??) based cheapo card would max out
at 2MB/sec on win-win, win-lin & lin-lin. All these speeds were measured
using ftp file transfers for large files and idle systems. The 4mb/sec speed
of the intel cards seemed to be because of the disk throughput. I wonder if
the intel cards use significantly less cpu to cause such good speeds. On
another note, i have transferred a 700MB file from a win2k workstation
having a 3com 100M card to a compaq server having hardware raid 5 and
connected to a gigabit switch with gigabit cards in around 2-3 mins. Which
is roughly 4-5mb/sec. The RAID system on the server was using 10k rpm drives
and had 6-7 or more hdds in the array. So i suppose that the hdd speed is a
limiting factor.

I am right now thinking about getting 4 80gb 5400 rpm drives and then
setting up my celeron 366 on raid 5, raid 1 and raid 0 to see the
performence i can get out of normal dlink 100mbps cards. That way i will be
able to measure the effect of lan throughput, cpu speed and linux + samba +
win2k ;)

Ambar Roy


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