Contrary to the older KD20, this NAS utilizes a single-core ARM CPU that is clocked to a much higher 1.2 GHz. We wonder why Shuttle didn't pick a dual-core again, but they probably thought that this particular single-core CPU has what it takes for a home NAS. Our tough test sessions will prove whether they did right or should have gone with a stronger processor, which, however, would take more juice, and energy-efficiency is a major theme among such small NAS boxes.
|Shuttle KD22 Specifications|
|Processor||Marvell 88F6707, single core, 1.2 GHz|
|Operating System||Embedded Linux|
|Memory||512 MB DDR3|
|Storage||2x 3.5"/2.5" SATA II|
|RAID Levels:||Single Disk, JBOD, |
RAID 0, 1
|Capacity||up to 8 TB (disks not included)|
|Networking||1x 10/100/1000 Mbit Ethernet, built-in IEEE 802.11 b/g/n wireless adapter with Hotspot fuction|
|Additional Connectors||2x USB 3.0 (front), 1x USB 2.0 (rear), SD card reader (front)|
|Dimensions|| 169.8(H) x 90(W) x 225(D) mm|
6.97(H) x 7.09(W) x 9.25(D) inch
|Power Consumption||Standby: 9.6 W|
In operation: 19 W
|Power Supply||External, 65 W, 100-240 V|
|Fan||1x 70 mm|
| Price excluding VAT|
(at the time of the review)
At 512 MB, there is very little RAM to back up the CPU, but the customized Linux firmware Shuttle tailored around the unit doesn't need much. However, we would still feel more comfortable with double twice as much. The unit can also take up to two HDDs for a total of 8 TB, though it unfortunately doesn't provide iSCSI support. Networking is one of the unit's strengths since it comes with an essential Ethernet port and a built-in WiFi network card, which allows it to act as a hot spot. The rest of the I/O interface includes two USB 3.0 ports comfortably located at the front, a single USB 2.0 at the rear, and an SD card reader on the face of the NAS. No eSATA port was included, but we believe that most users won't miss one.
The dimensions of the KD22 are very compact and its weight is low. Shuttle also says its power consumption to be very low, but we are going to take our own measurements to find out if the numbers they provided are accurate. The external power brick that feeds this NAS is small; however, the 65 W it can provide will be more than enough. Finally, the small fan is thermally controlled to keep noise output low, which is important since this NAS will mostly be used in homes, where noise can be an issue.
The price Shuttle asks for the KD22 looks very good considering its features, and the warranty exceeds the typical two-year period most NAS manufacturers provide for even their high-end models. We think that other NAS manufacturers should follow Shuttle's example by expanding their warranty periods. We are well aware of the fact that a NAS will most likely work around the clock, so two years add up to a ton of working hours, but one additional year should not effect the final price significantly.