Seagate Desktop HDD Barracuda 7200.9, 40GB, 20 pack, 40 GB, 7200 RPM, 2 MB, 3.5", Ultra-ATA/100 Seagate Desktop HDD Barracuda 7200.9, 40GB, 20 pack. HDD capacity: 40 GB, HDD speed: 7200 RPM, Storage drive buffer size: 2 MB, HDD size: 3.5", Interface: Ultra-ATA/100