[Hack&Lube]

Originally Posted by Rathji

If I was looking for an affordable hard drive to do backups at my house, I would get something like Vantec NexStar MX Dual 3.5in SATA HDD Enclosure w/ RAID, USB2.0 / eSATA. Supports a hardware raid configuration, and uses 3.5" disks so they are a bit cheaper.

Yeah, running in a RAID 1 configuration will always be more reliable but you get half the space because the system essentially sees only on one drive. Then every write automatically mirrors on the 2nd drive.