its true that WD does not make a single patter 7200rpm laptop drive in the 500+GB range (yet). The largest single platter drive you can get in 2.5 7200rpm is the 320GB WD3200BEKT. The Blue 5400rpm drive does come in a single platter 500gb size: WD5000BPVT, WD5000LPVX, & WD5000MPCK.