Ultrabook Hard Drives

The ultrabook specification uses thinner than usual laptop hard drives. Some lightweight laptops, though not specifically ultrabooks, may also use these thinner 7mm z-height 2.5" SATA hard drives. Typically, these hard drives are single platter. 
 Some current options are: 
 
 
 Momentus Thin , http://www.seagate.com/internal-hard-drives/laptop-hard-drives/momentus-thin/ 
 	 
 Travelstar z-series , http://www.hitachigst.com/internal-drives/mobile/travelstar/travelstar-z7k500 
 	 
 WD Scorpio Blue (“L” models), http://wdc.com/en/products/products.aspx?id=140