I will use a new Macbook and wish to keep all data in one 4-bay enclosure connected with Firwire (wish I could use eSATA but FW seems to be the only option on a macbook). Now, drive 1 and 2 I wish to use RAID1 mirror, but the other two I want free (JBOD) to use and pull out or replace as I wish. Is there an enclosure that is inexpensive and has a fan (I live in Bangkok now) that I can trust? There are so many products. None say I can or can't do this in the product descriptions. Any help would be greatly appreciated.