Thanks to Brian, Luke, and Michael for their speedy and dead-on replies, as well as Robert and Keith who emailed me directly.
The problem was indeed that we had all our switches and hosts at forced full duplex, while the NetApp was still at auto. Problem is now fixed. I only regret whatever keywords I used to search the NOW site and mailing list archives failed to turn up what is clearly a F.A.Q.!
We did the ifconfig with the full mediatype on the trunk itself and the 4 individual ethernets "automagically" changed to forced full. Please let me know if this is not the optimal way to change these. (this change and one for the single ethernet d0 are now in the rc file)
By the way, do most people using NFS use TCP instead of UDP because there is more to tune/tweak with TCP? I am trying to get this to become an Oracle backend, but copies currently average 1MB/sec and this is on an 800MB trunk. I was following some recent discussions regarding tuning and then tried some of the values for first UDP and then TCP and the TCP based transfers to a Sun 2.6 Ultra 60 were faster than UDP. We have a very new and fast 100based switched network so the docs would imply we should go w/ UDP for the lesser overhead, but I guess if there is more to tune one's particular client on TCP then that would be the optimum protocol.
Running Version 2 or Version 3 seemed to make no difference - does anyone have any opinions or options that would suggest otherwise?
Anyhow, thanks again to all who got us back on the right track.
Adam
On Thu, 20 Jan 2000 07:34:11 -0500 (EST), you wrote:
On Thu, 20 Jan 2000 adam-s@pacbell.net wrote:
We are new to the Netapp and are having the problem that while copying from the Netapp to either an NT (CIFS) or Sun Solaris 2.6 box (NFS), the throughput ranges from 24K/sec to 79K/sec. Copying from an NT or Sun is wonderfully fast (we have trunked the Quad Ethernet).
The immediate suggestion is to check the port speed and duplex settings on the Ethernet interfaces of your filer, your NT and Solaris clients, and your switch. Force them all to full duplex 100 Mbps and see what happens. You may also want to try backing down to just a single 100baseT link for testing (to eliminate the possibility that trunking is causing problems).
email: a d a m - s (a t) p a c b e l l d o t n e t