unRAID 6 benchmarks
Now that I’ve got unRAID up & running I thought it would be interesting to run some benchmarks so I could determine what kind of speed to expect. Bear in mind this is without a cache device installed as I am waiting on my SATA controller to arrive before installing the SSD. Why? The optical drive SATA port runs at SATA I speeds, hence the reason for buying the additional SATA controller. This way I can have 4 drives in the bay slots and the cache drive hooked into the second SATA controller.
The program I used to run these benchmarks is called ‘CrystalDiskMark‘. CrystalDiskMark is designed to quickly test the performance of your hard drives. The program allows you to measure sequential and random read/write speeds for a specific drive. In order to test unRAID I needed to mount one of the unRAID NAS shares as a volume within Windows (N:).
This is 5 x 4GB passes with two WD Red 3TB drives, one of which is acting as a parity disk:
And here are the results with 5 x 1 GB passes:
I don’t think that’s too bad considering I don’t have a cache device set up yet. With a cache device I think I should be hitting much higher numbers because I won’t need to read/write from the disk array. Still slower than my desktop mechanical drive for both sequential read and write speeds but I doubt I will notice the difference when it comes to real world usage – Hopefully anyway. Parity certainly had more of an impact on the speeds than I would have liked. My internal 1TB WD Blue mechanical drive clocked the below speeds. Much faster for sequential reads and writes but a hell of lot slower for the 4k metrics.
I might revisit this in the future when the SATA controller arrives so I can set up my cache device. Watch this space!