I've got an OMV5 server running on my Raspberry Pi 3b. I have a 2TB external drive attached to it (with it's own power) that is shared out via SMB to my network. My computers back up their files to that drive on a daily basis.
The other day I attached a second hard drive to it to set up rsync between the two drives. This second drive is a new 2.5" drive that is powered via USB, so getting it's power from the Pi. I started the first Rsync of the data last night before bed. There is about 1.5TB of data to copy over. When I checked it today, it had only copied about 600GB of data, and still going. The time I checked it, it had been going for 14 hours. So that's roughly 12 MBps per second, or 96 mbps. Am I doing the math right? Is this what I should be expecting? I know USB 2.0 standards are much higher, closer to 450mbps. But what other limitations might I be hitting?
Also, during the night and throughout today I have been receiving alerts from the monitoring system. Mostly these:
Event: Resource limit matched
Description: loadavg (5min) of 4.1 matches resource limit [loadavg (5min) > 4.0]
Running top, the load does run between 3 and 4.5 when I check it, but cpu percentage is very minimal, less than 1% most of the time. Temperature of the pi is also great, at like 35C.
Also got one of these, but only one and not until this morning:
Event: Does not exist
Description: process is not running
This triggered the monitoring system to: restart
It restarted collectd a minute later. Any thoughts?