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NC7770

Artem Mikhailov
Occasional Contributor

NC7770

Colleagues

There are three servers:

1. ML370G3 NC7771 Windows 2000,
2. DL580G2 NC7770 Windows NT 4.0,
3. DL580G2 NC7770 Windows 2000.

They are connected to Cisco 3550. Switch reports they are connecting at 1Gbit with no errors at interfaces. The question is: why bandwidth from 1 to 3 is approx. 30MByte/sec both ways, but from 1 to 2 is only 10Mbyte/sec both ways?
2 REPLIES
Brian_Murdoch
Honored Contributor

Re: NC7770

Hi,

Could it be NT4, specifically the NT4 Broadcom driver for the NC7770?

Please check that you have NC7770 driver version 7.30.730.0, available here.

http://h18023.www1.hp.com/support/files/server/us/download/16918.html

Have you tried changing the Cisco port and NC7770 card settings from Auto-Auto to fixed speeds or vice-versa for this NT4 box?

I hope this helps.

Brian

Artem Mikhailov
Occasional Contributor

Re: NC7770

I've updated drivers to the last version but it did not help. I think the bottleneck is RAID subsystem. During local copy process the throughput does not exceed 10MBytes/per second. For me it's a little bit slow. There is a 5304 with 256MB onboard memory connected to external encloshure with RAID1 72GB 10K. If I make an interruption of copy process of big enough file (200MB) and start that process immideatly again throughput rises up to the 40MB per sec. But this is the data exchange within the RAID's cache. After 1-2 second it gets slow down to the 10MBytes