UNTESTED The IBM Travelstar 40GB 2.5" IDE 4200RPM 2MB Laptop HDD is a silver internal laptop drive with a storage capacity of 40GB. It has a rotation speed of 4200 RPM and a cache of 2MB. This HDD is compatible with laptops and features a form factor of 2.5 inches. With a brand name of IBM and a product line of Travelstar, this hard drive is suitable for storing data and files in a compact and efficient manner.