Let me see if I can accurately explain my issue here. My network is fairly simple.
WD EX4 → Asus Router (1GB) → Windows 7 Laptop (802.11G), Windows 10 Laptop (802.llN), WD Live TV.
WD EX4 (same one as above) → Asus Router (1GB) → 1GB Switch (I forget the brand) → Windows 2012R2 Desktop (1GB), Windows 10 Desktop (1GB),
I work with a lot of video and thus transfer a ton of data too and from the EX4. The problem is that short amounts of Network activity between any machine to the EX4 work fine but if it is a lengthy session or if the session is frequent in a short timeframe, the connection between the EX4 and whichever machine times out. The size of the files seems to make no difference. I can move 1 large file or 100 small files and the result will be the same somewhere along the way in that the file transfer will time out and the connection to the share on the EX4 will be lost. This doesn’t happen every time I move a large file or set of files but it does happen at least 3 or 4 times a day.
The only way I have found to re-establish a connection is to reboot either the machine or the EX4. If the connection has timed out to one machine, the EX4 is still fully accessible by other machines. It will even remain accessible to VM’s running on a machine that can not currently connect to the EX4.
I have tried setting the SMBv preference on the EX4 to 1,2, and 3 while forcing the same version client side on different machines with not effect. I have turned off thumbnail services via ssh on the EX4. I have set SMB connections to persistent client side and disabled the Windows OS from shutting the NICs off to save power.
When the SMB connection times out, other services still function. The EX4 is still pingable from the machine, ftp, ssh, WebDav, etc are all still fully functioning with the machine that can no longer access the shares via SMB.
Also when the problem occurs, it is SMB device wide, not just the share on the EX4 that was being accessed but all 5 shares currently hosted by the EX4.
As a further test, I have moved the same data to and from shares from machine to machine without a single issue. Everything points to something with the EX4 causing the issue.
The Firmware is up to date and this problem has persisted through several firmware versions.
Frankly, I am at a loss here and any assistance would greatly be appreciated. Thank you for your time.