
Thanks for the reply.
The notebook I am using is Portege-2000 and I don't know what mother board it is using.From the Device Manager, I can see that an USB Mass Storage Device is detected but the device cannot be started and the error code is 10. The power light of the UBS removable disk is on after it is connected to the notebook.
The hard disk case is USB 2.0 external HDD case by Xanner and the hard disk is from IBM.As I am not too sure whether the hard disk is USB 1.0 or 2.0 now, is it possible that version difference between the hard disk case and hard disk is causing this problem?