Seagate ST9100823A 100GB UDMA/100 5400RPM 8MB 2.5" NB HDD Seagate Momentus 5400.2 ST9100823A 100 GB 8 MB 5400 RPM 2.5-inch Hard Drive General Features: 100 GB formatted capacity 5400 RPM spindle speed 8 MB buffer 12.5 ms average seek time 2.5-inch hard drive 9.5 mm form factor ATA-2/3/4/5/6 interface type Power Specifications: +5V, 0.42A Regulatory Approvals: CE cULus C-Tick BSMI MIC TUV