"I just realized the drive I put in there is 278 Gig. The drive already in there is 465 Gig. Could that keep it from rebuilding?" Absolutely.  The replacement disk must be AT LEAST as large as the disk it is replacing.
Getting a new one shipped. What is the procedure for adding it? Do I take the other offline first? ..actually I just noticed there is no option for taking off line. [IMAGE] All there is, is Blink and Unblink.
Poweredge 1950 drive failed.