IBM / Lenovo 1TB 7.2K 6GBPS NL SAS 2.5IN SFF HS HDD, P/N 81Y9690 This 7,200 rpm HDD provides 2.5-inch form factor that can be used as hot-swap drive. The HDD offerings for the IBM System x family of 2.5-inch SATA HDD is the highest performing SATA option and provides a wider selection of choices to satisfy a range of applications. 7,200 rpm speed to optimize performance Outstanding reliability that enables operation in RAID environments without compromising application performance or availability A 2.5-inch wide, NL form factor that allows maximum installations in supported System x systems