|QNAP TS-659 Pro II NAS Network Server|
|Reviews - Featured Reviews: Network|
|Written by Bruce Normann|
|Thursday, 09 June 2011|
Page 11 of 13
1GB RAID 5 Test Results
If you've got more than three HDD spindle to put in play, it makes sense to use one of the more advanced RAID configurations. RAID 5 is one of the most popular setups, primarily due to the balance it exhibits between capacity and redundancy. Not surprisingly, most NAS units that can support more than three HDDs also support RAID 5, so it makes sense to use it for test purposes.
The 1 GB RAID 5 disk write test is also roughly on par with the single disk results. This is excellent, as RAID 5 write performance can be a weak point, with all the computation overhead involved and the extra parity bits that need to be calculated and written to each of the drives..
10GB RAID 5 Test Results
Looking at read tests with a single 10GB file, the TS-659 Pro II really gets in the groove, breaking the 100 MB/s barrier. Indeed, it gets within striking distance of the results for internal data transfers, between the SSD and VelociRaptor drives running directly off the Intel P55 chipset. The internal drive architecture lost speed when going from 1GB transfers to 10 GB, but the TS-659 Pro II improved its performance when transferring large files, which I thought was interesting. It shows how this unit is built to carry the heavier data loads.
Looking at write tests with a single 10GB file, the TS-659 Pro II suffers from the typical RAID 5 write penalties due to the computing overhead required to deal with the parity bits. The various caches built into the system help out on the smaller file transfers, but they get filled up and lose their effectiveness when dealing with large files like this.
All in all, my impression of the test results is that the QNAP TS-659 Pro II puts in a solid performance, especially considering the added flexibility it offers in terms of advanced RAID support.
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