SMB share speed issue

Hi,

I'm using the latest stable version of OMV and am experiencing a strange behavior that is a very unstable transfer speed when i get files via smb from the OMV box. Have tested using large files exclusively to avoid the 'many small files' sort of thing. Local gigabit network (computers and switches), SSDs in my notebook, various transfers tested across network devices, checked (and swapped) cabling, rebooted devices, all working fine at max speed except when pulling data from the OMV box (all shares), which goes at random low speeds. It does seem to start at high (normal) speed for a few seconds then drops and gets quite random. Putting files onto the box works fine, constant transfer around the gigabit max. So just getting files from it seems to be an issue.

Any thoughts?

Came across this post which describes a similar issue but hasn't been 'solved': Reading from OMV is slow and variable, Writing is great

Also noticed in syslog a lot of link down / link up such as below when I copy the data from OMV (that's when the slow and fluctuating transfer speed is noticed).

Apr 20 09:32:39 omv kernel: [37713.577849] forcedeth 0000:00:07.0: eth0: link down
Apr 20 09:32:41 omv kernel: [37715.881502] forcedeth 0000:00:07.0: eth0: link up
Apr 20 09:34:08 omv kernel: [37802.544417] forcedeth 0000:00:07.0: eth0: link down
Apr 20 09:34:10 omv kernel: [37804.728108] forcedeth 0000:00:07.0: eth0: link up
Apr 20 09:36:27 omv kernel: [37941.859695] forcedeth 0000:00:07.0: eth0: link down
Apr 20 09:36:29 omv kernel: [37943.963734] forcedeth 0000:00:07.0: eth0: link up
Apr 20 09:36:33 omv kernel: [37948.049299] forcedeth 0000:00:07.0: eth0: link down
Apr 20 09:36:36 omv kernel: [37950.218895] forcedeth 0000:00:07.0: eth0: link up
Apr 20 09:36:59 omv kernel: [37973.307566] forcedeth 0000:00:07.0: eth0: link down
Apr 20 09:37:01 omv kernel: [37975.420133] forcedeth 0000:00:07.0: eth0: link up

Thanks for your reply WastlJ !

I'm not using the backports kernel however I've solved it by inserting an Intel Pci-e Gb adapter so it's probably the driver as you said. I may give the kernel a try if i get the time.

Installed Backports kernel but issue was still present so returned to the Intel adapter.

Motherboard is Asrock ALiveNF6G-DVI, product webpage sais onboard LAN is Realtek RTL8211B.

lspci output - 00:07.0 Bridge: NVIDIA Corporation MCP61 Ethernet (rev a2)