The fix consists of setting a parameter in file nf in folder /etc/ with sudo privileges, forcing the system to obey the parameter on the next use of SMB protocol (and after each reboot, obviously): The issue seems to come down to Apple’s SMB forcing default enabling of “client signing” which ruins performance.
This showed that older MyBook World II negotiates with SMB 1.x protocol (latest firmware v01.02.14 available) and later M圜loud storage asks for SMB 2.x protocol (firmware v03.04.01-230 kept on purpose) therefore causing a possible performance issue with latest Mac OS X systems, due to their newer and seemingly more secure SMB implementation.Īfter digging around, I read that there’s a hidden fix for SMB, just like the one posted by Dan Roncadin in his related article, which apparently increases transfer speeds due to the fact that it disables “client signing”. Next, in Terminal.app the following output was presented, after running the needed query command smbutil per volume:
So, this time I mounted via Finder both drives (Cmd + K) forcing the smb:// protocol:
I had read that in the older days, a quick solution to force Mac OS X to use older SMB versions, was to use CIFS protocol but today, this didn’t work. After all, I was using on my Gigabit home LAN two different WD network storage devices, namely MyBook II World (2x1TB) and M圜loud (1x2TB), most likely with different SMB implementations each. This meant that Apple most likely fiddled again with SMB (Samba) protocol in this OS X release, and once more we had to find a fix for returning to “status quo”. However, I soon realized that my connections to both network backup HDDs via SMB was painfully slow, evidently much slower than I was used to, when synchronizing files from my Mac to my Western Digital network drives. Until recently, I’ve been working on a Mac using Yosemite 10.10.5 and was quite happy with it, but since Sierra 10.12.2 was out, I knew I had to move on in my life, so I decided to make a clean installation (dual boot) of El Capitan to the latest available version 10.11.6 including all recent updates from Apple.
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