Seagate Desktop HDD Barracuda 7200.9 40GB Serial ATA II 7200RPM 2MB NCQ 20pk bulk, 40 GB, 7200 RPM, 2 MB, 3.5", Serial ATA II Seagate Desktop HDD Barracuda 7200.9 40GB Serial ATA II 7200RPM 2MB NCQ 20pk bulk. HDD capacity: 40 GB, HDD speed: 7200 RPM, Storage drive buffer size: 2 MB, HDD size: 3.5", Interface: Serial ATA II