On T110/SBS 2008 I just installed an external RAID drive now available from DELL. Part no. A300636. Configured as RAID 1, It sees the WD Caviar 1TB drives as 305GB at the BIOS and OS levels. If anyone knows how or can point me to where I can get it to see the full drive capacity I'd love the help.
I did not really expect it to work out of the box, so I'm not surprised it will take some tinkering to get a hot swappable RAID 1 external backup device working,