Western Digital My Book Duo DAS Reviewby Ganesh T S on July 12, 2014 6:00 PM EST
The WD My Book Duo ships in a RAID 0 configuration by default. We first processed our DAS test suite with the default configuration, before switching over to RAID 1 (using the WD Drive Utilities). We also tried setting up an encryption password and rerunning the benchmark numbers. The figures were quite similar (within the margins expected in repeated runs of the same benchmark), which led us to the conclusion that enabling / disabling encryption has no effect on the performance of the DAS. The full numbers are provided in the table below.
|WD My Book Duo 8 TB Performance (MBps)|
|RAID 0||RAID 1|
|Adobe Photoshop (Light)||3.81||147.16||3.26||188.7|
|Adobe Photoshop (Heavy)||5.1||171.04||4.47||181.61|
|Adobe After Effects||3.71||47.18||3.1||65.43|
While RAID 0, as expected, performs better for large file transfers (such as Blu-ray folders), RAID 1 wins out on some types of workloads too. On the whole, the DAS fulfills its advertised potential. Reaching up to almost 280 MBps for certain workloads, it is definitely a compelling solution for consumers looking for fast and reliable high capacity storage at a reasonable cost.
Various power consumption numbers, as well as duration for RAID rebuild (which is discussed in detail in the next section) are provided in the table below.
|WD My Book Duo 8 TB Power Consumption & RAID Rebuild|
|Activity||Duration||Avg. Power Consumption|
|Disks Head Parked||10.22 W|
|Disks Spun Down||-||2.19 W|
|Benchmark Mode (RAID 0)||-||14.61 W|
|Benchmark Mode (RAID 1)||-||16.15 W|
|RAID-1 Rebuild||9h 47m 9s||15.99 W|
We find that the power consumption numbers are quite low compared to the 2big Thunderbolt 2. The presence of a 5400 rpm hard drive, coupled with some nifty firmware features help the My Book Duo score over the Desktop HDD-laden LaCie 2big Thunderbolt 2 in this aspect.