I have a PowerEdge SC440, which I'd like to convert to a Windows Home Server 2011 machine. It currently has 2x 160GB drives and SAS5IR controller.

I'd like to replace the drives with 2x 2TB Western Digital Green Caviar drives in RAID1. Is there any reason I can't do that? The specs show a smaller drive max, but is that just because larger drives were not available at that time or is there some other limitation?

The specs for the system show:

Maximum internal storage

• Up to 600GB: two 300GB cabled SAS (10K rpm);
• Up to 1TB: two 500GB cabled SATA (7.2K rpm)

Hard drives

• 3.5” SAS (10K rpm): 73GB,146GB, 300GB;
• 3.5” SATA (7.2K rpm): 80GB,160GB, 250GB, 500GB 

http://www.dell.com/downloads/ap/products/servers/en/PESC440_spec_ap.pdf

Thanks.