Performance NAS: HW RAID or ZRAID?

Question

ZFS

Planned NAS for group non-linear editing. There is a question about the choice between hardware RAID or soft ZRAID. It would seem that the choice in favor of hardware RAID is obvious, but it does not seem so to me. Here's why: Hardware RAID takes care of all the scheduling and optimization of read/write operations. ZRAID performs the same functions, but it uses the resources of the main system: CPU and memory. In the case where the system is loaded with applications, this is a strong argument in favor of hardware RAID, but if the system does not run any applications other than a file server, then this is not critical. Moreover, in this case (software RAID), more resources are allocated to perform the functions of managing and optimizing read / write operations - a productive CPU and more memory.

I/O interface performance issues (i.e. NAS, DAS or SAN) are considered unimportant, since 10G Ethernet removes the bottleneck on the data transfer interface. In summary, to build a productive file server, which technology will give the best performance indicators, namely, the access time to a random file with a high number of accesses?

PS I understand that there are many omissions in the formulation of the question, but it is important for me to understand what aspects I did not take into account in my reasoning.

Answer 1

Yes, about the same, especially for such a task as editing, where quite linear reading.
Here you need to think more about what to do if the raid controller dies, or there is a power outage when writing to disks.