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We benchmarked the NAS’s performance using Intel NASPT 1.7.0 and Western Digital’s Caviar Black WD5001AALS disks (500 GB). We test all NASes under the same conditions in our labs, so you can compare their results easily. We only changed one factory default in the NAS’s settings: we turned Jumbo Frames on. Then we created a disk volume, a shared folder and a user with full access rights for that folder.

The first diagram shows the performance of the NAS in the X-RAID mode: one disk or two disks in a fault-tolerant array.

The increased reliability does not affect the speed: the numbers are almost the same. The speed of reading large files is quite high at over 40 MBps but the speed of writing is just average at 15 MBps. So, if your NAS is going to do a lot of writing, you may want to consider other models.

The second group of tests was performed with different configurations of FleX-RAID arrays. Besides a single disk and a mirror, there is an array with data striping here.

We can see that the relatively weak platform does not allow the speed to grow up in the RAID0 mode. With RAID1, hardware optimizations for reading must be in effect because the speed is higher than with the single HDD. The write speed lowers, but not by much as it wasn’t high to start with. There is almost no difference between the X-RAID and FleX-RAID modes in terms of speed, so you should better choose between them basing on their functionality. The NAS is overall fast at reading files, but its writing speed isn’t high. For example, writing 250 gigabytes of data from your desktop computer’s disk to the NAS is going to take no less than 5 hours.

Turning off journaling in the file system may help somewhat. As we found out using a single-disk FleX-RAID mode, this may increase the write speed by 7 to 16% but the read speed is lowered by 4 to 16%. That’s not much of a difference, but it’s good that the user has some flexibility in adjusting the NAS’s performance to his taste.

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