Lenovo 40GB HDD ATA 100 40GB Ultra-ATA/100 internal hard drive

40GB HDD ATA 100 5400RPM 40GB per disk platter recording density on a 5400 rpm drive yielding sustained data rates of 18 - 36 MBps for outstanding performance in data streaming applications exceeding that of 1999's best 7,200 rpm SCSI drives
5400rpm disk rotational speed is fundamental for excellent mainstream drive performance in both random and sequential data operations
Self-Monitoring, Analysis, and Reporting Technology (S.M.A.R.T.), included in all our drives enables them, for many failure mechanisms, to inform the system of impending drive failure before it occurs. IBM LAN connected systems with S.M.A.R.T. Reaction software can automatically backup the data on the drive to other LAN storage devices, reducing the risk of data loss. Drives prediciting failure within the limited warranty period are eligible for replacement, before failure, at IBM's expense.