I'm in the middle of moving 15 TB of data from my Synology NAS (DS415+) to my FreeNAS server (11.1U6) and I'm getting only about 300 Mbps (steady). I've always gotten lower than expected transfer speeds with FreeNAS, but never troubleshot it because it didn't serve anything crucial until now. I'm pretty sure the problem isn't the Synology NAS as I've achieved 110+ Mbps transfer speeds with other 1 Gb devices on the network. Based on the environment below any suggestions on getting closer to...
getting slow speeds over gigabit
getting slow speeds over gigabit