Is it possible to install the 64-bit Ubuntu linux server operating system on the TS200? Also, can I use EasyStartup to partition the RAID system beforehand?
yes, it is! I have debian on it, runs ok, but 64bit hangs sometimes 4 few seconds, but its ok...
4 raids use mdadm, prepare the HDDs with fdisk, and its done!
[user]$su [root]#aptitude search mdadm p mdadm - tool to administer Linux MD arrays (software RAID)