It's time to try another drive. Drives fail all the time. That's why you read so much about backup.
Now while there's more to this such as you telling if the BIOS or device manager shows the drive, before we go one step further, you must know if we can re-initialize the drive. This is NOT formatting!
Bob
I added a second hard drive to a vista desktop, and it went pretty well for a non computer expert. Then, all of a sudden, the computer would not recognize it. I moved it to another computer(win 7) and had the same problem. any help or suggestions would be appreciated.. Hatachi Deskstar, 400gb, sata
Newbie, by the way.

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