Toshiba MK3256GSY 320GB 7200RPM 2.5 SATA HD Toshiba MK3256GSY 320GB SATA/300 2.5-inch Hard Drive General Features: 320 GB storage capacity SATA/300 interface 16 MB buffer 7200 RPM spindle speed 512 bytes/sector 2.0 heads 3.0 platters 3.0 Gbps 1.0 ms track-to-track average seek time Super-quiet Seek technology Durable and reliable 600,000MTTF hours 12.0 ms average read seek time 2.5-inch form factor 9.5 mm drive height