I have a FreeBSD 4.8 server with a 3ware RAID controller in a RAID5 configuration. The server has an Intel PRO/1000 network card in it. I'm trying to transfer big (100MB+) files from this server to a Firewire drive on my Windows XP workstation which also has an Intel PRO/1000 NIC. The transfer speed of the data caps at around 120mbps. It was lower, but I set net.inet.tcp.sendspace to 65536 and it seemed to help.
The 3ware array says it is around 25% busy (from systat -vmstat) so I don't think it is read performance that is the limiting factor. The cpu on the server is about 65% idle (from top). The windows xp workstation is around 75% idle. When I connect the firewire drive directly to the server the data transfered at 160mbps. I'd continue doing the transfers locally except the data needs to be put on an NTFS partition and I couldn't get FreeBSD to write to one and from the man page it appears that write support isn't fully complete. My question is why am I loosing ~40mbps when doing this transfer over the network? Both the workstation and the server are connected to Cisco 3524 switches in the copper gig port. Both switches are connected via the other gbic port which has a fiber gig gbic in it. The average utilization of these interfaces is less than 200mbit, which should leave plenty of bandwidth for my data transfer. Any suggestions on how to improve my performance? Is there a better list for me to ask this question on? Thanks, Michael _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"