IBM / Lenovo, 900GB, SAS 10K RPM 2.5IN SFF HOTSWAP HDD F/ SYST X3350, P/N 81Y9650 IBM 10K SAS HDD can provide the performance required for extensive storage capacity. The HDD provides 2.5-inch form factor options that can be used as hot-swap and simple-swap drives. 2.5-inch, slim-line form factor optimizes storage capacity Outstanding reliability that enables operation in RAID environments without compromising application performance or availability SAS compliance enables these HDDs to connect directly to System x systems S.M.A.R.T. allows software utilities to alert you of certain impending drive failures so replacements can be made before a problem occurs