Jean,
   From my experience (and the generally accepted rule of thumb for non-PCI HP3000s), about 20-25 Mb is what 100Bt performance is going to be.
   I don't believe you're 3Com switch is having any impact on performance.  The key items are to make sure you don't specify Autosense for half/full duplex in MPE and make sure the switch port and the 3000 are set the same (half or full).  That'll be about the best you can shoot for.
 
Jack Connor
Systec Support Sevices
770-888-7637

________________________________

From: HP-3000 Systems Discussion on behalf of Northern Credit Bureaus Inc
Sent: Fri 10/14/2005 7:02 AM
To: [log in to unmask]
Subject: [HP3000-L] 100 base T performance over 3com switch



I am a bit deceived over the performance of the 100 Base T network card on the HP979KS/400.  Ok, it is twice as fast as the 10 Base T (of what I had before). I get about 2.0 Mbyte/s or 16 Mbits/s.  I was actually expecting somewhere in the range of 80 Mbits/s.  The 3com switch  (model 3C16792A) I am using has 2.5 Mbytes of cache. I specified the maximum buffer size in NMGR i.e 50.  The funny thing is when I copy a file from one pc to another I get transfer rates of  115Kbytes/s.  I don't understand, PC's are supposed to be a lot faster.  The supervisor software that comes freely with 3Com does not give much info.  Some of the software out there cost $600 and up.  I am looking for a software that will show possible collisions i.e troubleshoot if necessary the network.  The 16 port switch that I have carry a 3Gbit/s bandwidth overall.  Should I have bought a more expensive unit for better performance?

Has anyone been able to obtain better performance on an HP9x9 box?

Thanks,

Jean Huot
Northern Credit Bureaus Inc.
(819) 762-4351

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