Slow SMB vs iperf results

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gplaurin

Cadet
Joined
Mar 2, 2018
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1
Hi,

My transfers speed with Freenas on SMB as been so-so, I can only get about 70MB/s when reading and writing from Windows but if I make an iperf test here are my results:

Freenas as server:
Server listening on TCP port 5001
TCP window size: 64.0 KByte (default)
------------------------------------------------------------
[ 4] local 192.168.1.84 port 5001 connected with 192.168.1.50 port 50203
[ ID] Interval Transfer Bandwidth
[ 4] 0.0-20.0 sec 2.17 GBytes 929 Mbits/sec

Windows as server:
Client connecting to 192.168.1.50, TCP port 5001
TCP window size: 32.8 KByte (default)
------------------------------------------------------------
[ 3] local 192.168.1.84 port 32900 connected with 192.168.1.50 port 5001
[ ID] Interval Transfer Bandwidth
[ 3] 0.0-20.0 sec 2.19 GBytes 940 Mbits/sec

I should be getting more? When my freenas server was Windows 10 I was always getting >100Mb/s.

The first Gb is always the fastest at 105Mb/s and after that it's slowing down to 65-70Mb/s (see screenshot).

Any hint?
 

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kdragon75

Wizard
Joined
Aug 7, 2016
Messages
2,457
You should take a look at the forum rules. For all we know, you have a half dead drive in a system running on a core2 cpu at < 1.2GHz.
 
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