I have 2x 8TB HDDs that were used in an old QNAP NAS. They are in software RAID0 mode (so 16TB of data), and I need to mount them in the new TrueNAS Scale to copy the data onto a newly created ZFS RAID-Z2. The problem is that the new distribution is missing the “md-mod.ko” kernel module, so I am unable to assemble the old RAID0 and mount it. In the old TrueNAS, “md-mod.ko” is functional, but in the new distribution, where it is not compiled, it cannot be loaded using insmod or modprobe.
Maybe 40 hours to transfer 16TB over a gigabit connection. That’s assuming that your QNAP is at 100%. At half capacity, it would take maybe 20 hours to transfer the data.