QNAP TS-419P+ Turbo NAS
Feb 3rd, 2011 | By SimonUnlike JBOD and RAID 0, RAID 5 combines both speed and redundancy. A RAID 5 array stripes data and parity across each disk. Those that are concerned with data integrity have likely heard of RAID 1, mirroring. It’s generally slower as the data needs to be written onto both disks. With RAID5 you get the advantage of speed and redundancy. Total storage is the combined total number of all disks minus one as redundancy where parity is distributed over all disks in the array. RAID 5 is perhaps the cheapest way to boost hard disk performance while keeping data safe.
The effects of caching are still obvious as I had to eliminate a number of data points, you won’t find any NAS device operating in the 3GB/s range, as much as I wish it were possible! I was expecting a performance hit and 20MB/s isn’t bad when you want some peace of mind for data recovery. The average speed hovered around 55MB/s.
The read performance wasn’t affected with the multiple drive performance. The average remained at 71MB/s across the board.