SMB3 multichannel experience

Stefan75

Member
Jan 22, 2018
91
9
8
46
Switzerland
Hey

Just wanted to post my experience with SMB3 multichannel.

On one side I have Windows 2012 server with 2 HP/Broadcom NICs.
On the other side Windows 10 with a PCIe x1 Intel NIC and the onboard Realtek.

I go through two Netgear GS116Ev2 that are set up to make 2 separate VLAN/Subnets.
The second subnet gets no default gateway by DHCP (windows can only have one gateway I think).

I can read and write up to 200MB/s in both directions, but only if I use Explorer or 7-ZipFM.
As soon as I use my favorite file manager I can only write up to 100MB/s to the server. I checked this with other 2 pane file managers, if they use a built in file copy mechanism then multichannel doesn't work (in both directions)!

cu
 

cesmith9999

Well-Known Member
Mar 26, 2013
1,352
455
83
it is a bug in your file manager as to how they are calling the COPY APIs. I have over 800 servers with dual 40 GB connections and they are level most of the time. 99% of what is used is robocopy though.

Chris
 
  • Like
Reactions: Evan