Problems with 2 different Caviar Green Drives

I have 2 different WD Caviar Green Drives, a 2TB and 3 TB.  Both have become in accessible.  I have not dropped them and they were both in clean dry places.  No reason for them to stop working.  No noise is coming from them and they are running but the system is not recognizing them,  any issues with these?  Any advice?

Lawrence

Hello,

Try running a diagnostic on the drives using WD DLG to determine the drive’s status.