Like every other website on the planet, SmallNetBuilder uses cookies. Our cookies track login status, but we only allow admins to log in anyway, so those don't apply to you. Any other cookies you pick up during your visit come from advertisers, which we don't control.
If you continue to use the site, you agree to tolerate our use of cookies. Thank you!

Router Charts

Click for Router Charts

Router Ranker

Click for Router Ranker

NAS Charts

Click for NAS Charts

NAS Ranker

Click for NAS Ranker

More Tools

Click for More Tools

NAS How To

RAID 5 NAS Performance

Updated 8/1/2006

So, how good is the DIY RAID 5 NAS? Figures 24 through 27 compare the performance of the DIY RAID 5 NAS to Buffalo Technology's 1 TB TeraStation NAS. The same iozone procedure was used to take all of the data shown, but I ran iozone on a Windows XP Pro, 2.4 GHz Celeron P4, 1 GB RAM machine. So while the results aren't exactly apples-to-apples, the test machines used are close enough in configuration to allow a reasonably accurate comparison.

Figure 24: Write Performance w/ 100 Mbps LAN

Figure 24: Write Performance w/ 100 Mbps LAN (click to enlarge)

Figure 25: Read Performance w/ 100 Mbps LAN

Figure 25: Read Performance w/ 100 Mbps LAN (click to enlarge)

Figure 26: Write Performance w/ 1000 Mbps LAN

Figure 26: Write Performance w/ 1000 Mbps LAN (click to enlarge)

From the benchmark results, it is clear that if you are going to build your own NAS, you want to build it with a gigabit Ethernet card. On smaller file sizes, the gigabit-equipped DIY RAID 5 NAS is clearly superior on both writes and reads. But on very large files, it is slower than the TeraStation.

Figure 27: Read Performance w/ 1000 Mbps LAN

Figure 27: Read Performance w/ 1000 Mbps LAN (click to enlarge)

This behavior holds up regardless of operating system used on the DIY NAS. Just for fun, I installed Free NAS .671 to compare with the Ubuntu results. Averages tend to hide things, but I've computed the average read and write speeds for the TeraStation and the DIY RAID 5 NAS using Ubuntu and FreeNAS .671 and summarized the results in Table 2. The read and write results represent the average of 32, 64, 128, 256, 512 and 1024 MB file size runs using 64 kB record size.

The averaged results show that the DIY server using Ubuntu comes out a little faster with a 100 Mbps connection, but blows away the Terastation with a gigabit Ethernet connection - even without using Jumbo frames! Since a gigabit Ethernet NIC costs less than $20, its inclusion in any DIY NAS is a no-brainer.

TeraStation NAS 1.0 TB DIY RAID 5 NAS
Ubuntu 6.06 DT FreeNAS .671
Avg Write
1000 Mbps
7,036 23,940 4,479
Avg Read
1000 Mbps
11,900 27,566 20,152
Avg Write
4,897 5,059 Not Tested
Avg Read
8,299 9,136 Not Tested
Table 2: Average Performance Summary- DIY NAS vs. Buffalo Terastation

More NAS

Wi-Fi System Tools
Check out our Wi-Fi System Charts, Ranker and Finder!

Support Us!

If you like what we do and want to thank us, just buy something on Amazon. We'll get a small commission on anything you buy. Thanks!

Over In The Forums

I have an RT-86U and because of various reasons ended up starting to use Merlin on it. Works ok'ish but lately I haven't been able to add anymore DHCP...
had a share problem but figured it out. all better now.wish there was a way to delete this post
Before anyone says "what could you need 10GbE for anyway", I will say that I do not need 10GbE, but I do need more than 1GbE. So, I am looking for opt...
I’m not sure if this is the correct forum so, mods, please move if needed. My situation is that we about to get the NBN FTTN / VDSL2+ via iiNet and I’...
I have always used RDP to remotely connect to an internal machine at my home using OpenVPN remotely, but recently I have not been able to ...

Don't Miss These

  • 1
  • 2
  • 3