IC25N020ATMR04-0 - Hitachi Travelstar 5K80 20GB 4200RPM IDE Laptop Hard Drive (Dell 1E321) 08K0851 Rotational speed: 4200 RPM. Storage capacity: 20 GB. Data transfer rate: 100 MBps. Seek time: 12 ms. Buffer size: 2 MB. Average latency: 7.14 ms. Interface: DMA/ATA-100 (Ultra). Compatible with Dell Inspiron 1100, 1150, 300m, Latitude D400, D600, D800.