All partitions missing when copying

I bought a new 320GB SATA hard drive few months ago no recently when i try to copy something to the drive after about 20 seconds the all the partitions in the hard drive sudden开发者_Python百科ly disappears.

The hard drive is not shown in either Disk manager or device manager. To get the HD work i have to restart the PC again.The same thing happens when i try to copy. Even when i play any audio or video after abt 5 minutes i get the same problem.

The drives are NTFS and im running Windows XP.. Xan some one please help me solve the problem??

did you check all the wires ? sounds like a disconnect of the wire somehow ... otherwise the hdd is broken...

The problem was the ide hard drive that i had connected, there seems to be a speed issue. Changing the ide to a different sata drive solved it