Big problem with 10Gb network system

[snaptec]

Peak seems about 9gbit/s and overall just 3,9 gbits, right?
Can you please test in both directions?
maybe there is already a problem on the wire, or did you stop the iperf before the overall was finished?

 

[skyyxy]

Looks like 4gbps which is way less than 10gbps.

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thanks a lot friend, but something funny, before i did sonething wrong as you know that i used hpt2720 4520 or lsi 9260 to build hard raid, but you said thats wrong. anyway, in that way the speed for client read is very fast like 900-1000mb/s, but for write is unstable(first 500gb is fast then drop to 300mb or lower /s even 0).i dont know why or something i need to do.thanks

 

[skyyxy]

Peak seems about 9gbit/s and overall just 3,9 gbits, right?
Can you please test in both directions?
maybe there is already a problem on the wire, or did you stop the iperf before the overall was finished?

thanks a lot. i will try that as you said. thanks

 

[ferdina]

maybe It looks like the write buffer is exhausted. When it drops to 300MB, is the size of the copied file similar?