GOS v4 and 1TB drives
 

For those who have had a burning to know the answer to this question;

I just installed a 1TB SATA drive in a Snap 4500 with Guardian OS v 4.4.049. The system brought the drive online as 932GB, which should be about right. I did not try building any RAID arrays or copy data back and forth etc, but it "appears" Guardian OS v4 will handle 1TB drives, I cannot say for 1.5TB drives since I have none to try with.

Hope that helps...