My router and set up are mentioned below. I should also say that I’ve tried both iMacs connecting to the NAS via cables and wifi and in both cases the cable method fails.
Router - TP-Link Archer D7 AC1750 (ADSL2+ dual band etc)
Power line - TP-Link TL-PA7020 KIT AV1000 (2 port gigabit etc)
Cat 6A cables - 10 metre & 1 metre
Have also tried Cat 5E cables similar lengths
Switch - Netgear GS608-400UKS gigabit (connected to the router but none of the above are connect to it)
iMac 1 (El Capitan (10.11.1) connects via wifi - all good
iMac 2 (Yosemite (10.10.5) connects via ethernet (Cat 6A) > Power line > Router
Looked at your video and I am wondering why are you using AFP for the file transfer? Apple has deprecated AFP in favor of SMB2 (which shows up as smb:// address in your video right at the beginning). Why don’t you try SMB aka Samba (on Linux) aka CIFS (on Windows). That’s aways been the standard for Windows and for several years has been the default fr Macs as well (since Mavericks), though AFP is still available as an option. Have you tried SMB and gotten similar results?
After spending around 2 hours with tech support, they blamed my power line adaptor for the fault. Basically they wanted to shift the problem away from them. I told them that I’ve tried two different branded power line adaptors and the problem persist Bad customer service!
I’ve tried different:
Power line adaptors
And the problem is still there. I asked for a replacement drive and have’t heard anything in 3/4 weeks.
I recently read somewhere that if you buy a diskless system (I bought a case and two drives separately) that they need to be formatted. I think I did this at the start but can’t be sure anymore. Question is will this make a difference? Especially when connecting to the drive is fine over the wifi network
Hopefully you have already solved your problem, but if not… We recently purchased a new iMac (running El Capitan, whereas all the others are on Snow Leopard) at work and had disastrously slow connection speeds to all our servers (ReadyNAS Duo via AFP/SMB, Windows server, Mac server, etc.). It would take about 20 minutes to copy a 10 MB file. After weeks of despair we finally identified the problem as being our Netgear GS608 switch (which you also have). As soon as that was removed from the network, the iMac’s connection speeds matched our expectations. So, maybe try removing your switch (if you haven’t already) to see if that fixes your issue.
Thanks for your reply. I haven’t solved it yet and appreciate any advice/tips
I haven’t tried removing the switch form the network yet. It’s a good call and will try it! I didn’t remove it before because the EX2 is connected to the router and didn’t think it was worth doing but your post gives me some confidence