DK23CA-20 Hitachi Travelstar DK23CA 2.5-inch ATA-5 Hard Drive DK23CA-20 Hitachi 20 GB Laptop Hard Drive DK23CA-20 interface- IDE, capacity- 20 GB speed- 4200 RPM max transfer rate- 100 MBytes/sec access time- 120 ms, buffer- 2.03 MB