Raid 5 over 300MB/s write possible?

[wiski15b]

Hey everyone,
My knowledge concerning external raid is pretty limited. However, I can't seem to find a raid enclosure that can get reasonable write speeds for terabytes of data with redundancy. I'm limited to USB 3 and esata speeds being on a 2009 Mac Pro (no thunderbolt). From what I understand, raid 5 has limited write speeds that are heavily dependent on the controller. All of the external enclosures I have looked at seem to be limited to about 200 to 250MB/s write speeds. Is it even possible to get over 300MB/s using raid 5 over USB 3 or esata. Or is raid 10 a more viable option?
Thanks,
Matt

 

[pastrychef]

Yes, it's possible.

Source: https://www.synology.com/en-us/products/performance#5_10bay


In this example, they bonded four 1gigabit ethernet connections to achieve these throughputs.

But if you are looking to get high speeds to and from a single system, you would be better off using 10GbE. I put together my own NAS and I get about 300MB/s writes and 800MB/s reads using extremely slow drives.

In the following thread, I detailed how I got 10GbE up and running on my Mac Pro for under $100:
https://forums.macrumors.com/threads/what-are-the-options-for-10gbe-on-mac-pros.1959937/

This following post details the NAS that I'm using:
https://forums.macrumors.com/threads/raid-5-enclosure-benchmarks.1970438/#post-22867837