I use the hard drive in an external housing therefore not work as intended in a NAS server. Therefore, I can say nothing about the raid skills. Larger data can be readily move and copy, the board also has 64MB cache. The plate is slightly audible, but does not interfere further.
The board is suitable for continuous use, we use plate mainly outsource to old data. Partly what is banished from the NAS. The plate with its 2TB ideal as a mass storage.