Lion no longer recognizes external hard drive.

I've had Lion since the first day it was out.  All of a sudden, as of Sunday July 31, it is no longer recognizing my external hard drive, prevoiusly used for time machine.  I can see the disk in disk utility (disk repair does not fix the issure); however, it does not show up in the finder.  Anyone know how to fix this?

Since you haven't provided any helpful information all I can suggest is this:
Open Disk Utility in the Utilities folder. If the drive does not appear in DU's sidebar listing, then it most likely has died and needs to be replaced. Take it into Apple for service.

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