Increase your hard drive capacity with a larger primary system hard drive of ThinkPad X30/X31 T R and A Series notebooks or add a second HDD to the system via the Ultrabay 2000 in the T20/30 R30/40 and A Series ThinkPad Dock II and UltraBase X3 media slice. Or for use with the 2nd HDD Adapter for Ultrabay Slim in the T40 and R50 Series and the X4 Ultrabase Dock. Not supported as a primary hard drive in the ThinkPad X40 Series.Primary InformationHard Drive Type : Internal Form Factor : 2.5" x 1/8H Hard Drive Capacity : 80 GB Hard Drive Interface Type : ATA-100 Hard Drive / Average Seek Time : 12 Ms Hard Drive Spindle Speed : 5400 Rpm Width : 2.8 Inch Depth : 3.9 Inch Height : 0.4 Inch PC Compatibility : PC Average Latency :5.5 ms Hard DriveBuffer Size : 8 MB Storage Controller Type : EIDE Hard Drive / Data Transfer Rate : 100 MBps Service&SupportService & Support Type : 1 year warranty UNSPSC CodeUNSPSC Code : 43201803 Product IDUPC: 000435013521Manufacturer Part: 09N4273