Data drives 2 x Samsung F1 1TB in RAID 1 (for data security)
i'd reconsider this. raid1 won't improve _data security_ in any way whatsoever, it would just slightly improve the availability of your system, and reduce downtime on hard-disk failures.
no kind of live data replication, especially a low-level, transparent to the filesystem layer one like raid1, would improve on _data security_. filesystem corruption would just be duplicated, accidental or malware-induced data loss would be duplicated. if a cheap improvement of data security is what you wish, then keep the second disk outside of your system case, preferrably store it at a physically different location (like a safe deposit box at your local bank), and do your backups on a regular basis.
and don't get me wrong -- raid1 is great, i'm using it alot, but -- as I've already said, and I just can't stress it enough: it's no improvement to the safety of your data.