QNAP TS-259 Pro Turbo NASMar 2nd, 2010 | By Simon
RAID 1 mirrors your hard drives so each stores the same information. If one drive fails, the second drive will still have your data. This test was only conducted with two drives in use. As you can expect, the performance will decrease to allow for mirroring. With the effects of mirroring, I’m not surprised to see the read rates to be slightly slower. That said, with the powerful Intel Atom processor, the overhead requirements are managed very well and we see only the smallest performance drop. The average writer transfer rate is 97MB/s, only 6MB/s shy of the RAID 0 results.
The reader and re-reader results are not impacted by the mirroring drive configuration. The average is still in the 60MB/s region.