QNAP TS-419P+ Turbo NAS
Feb 3rd, 2011 | By SimonRAID 6 is an extension of RAID 5 but far less common. At the cost of greater redundancy, it can recover from the loss of two disks. With RAID 6 the double parity means less of a hit on performance while rebuilding and you’re not at risk of data loss while the rebuilding is being complete.
As expected, the performance is even slower than RAID 5 but in most cases it is worth the performance hit. When you start getting errors or drive feailures, RAID 6 will keep your system up and running at the same speed whereas RAID 5 will start to crawl. We’ve got an average write speed of 55MB/s, a little less than half of JBOD.
The read speeds weren’t affected as we manage a very strong 70MB/s read and re-read rate.