StarTech.com Hard Drive Array

This eSATA/USB External Dual SATA Hot-swap Hard Drive Enclosure lets you install two 3.5in SATA (SATA, SATA II) drives, each at a capacity of 2 TB (for a total max capacity of 4TB), with support for a broad range of RAID applications including RAID 0, RAID 1, BIG, JBOD, SAFE33 & SAFE50. Delivering maximum versatility, the Dual SATA External Hard Drive Enclosure can be connected to a computer using either eSATA or USB 2.0, and features built-in port multiplier support that allows both of the installed SATA hard drives to be connected using a single eSATA connection to your computer (if using an eSATA connection). The hot-swappable trays allow you to quickly remove and install hard drives without having to reboot or disconnect the drive enclosure. Plus, the dual SATA hard drive enclosure offers built-in RAID support, which will rebuild the RAID array in the event a new drive is inserted - providing seamless uninterrupted communication with your PC and data.