Wow, mine has 4.5 TB on the array too, wonder if we have the same stuff? lol. It is at about 37% now, but as long as it keeps going no worries.
I do have it all backed up on the home server, though am keen to dissassemble that after I get the new one working with a Promise EX16350. It get really expensive to keep adding external 5 bay cases with port multipliers, so rebuilding it using Vista and in a new Lian li case, should be good, if I can get the Promise card to work.