Seagate Barracuda ATA IV 40GB UDMA/100 7200RPM 2MB IDE Hard Drive Seagate 40GB UDMA/100 IDE Hard Drive General Features: 40 GB Formatted Capacity Spindle Speed: 7200RPM Data Buffer: 2MB Average Seek Time: 9ms Latency: 4.17ms Transfer Rate: UDMA/100 Interface: EIDE Regulatory Approvals: CE UL CSA MIC C-Tick