Western Digital My Book Studio II external hard drive won't mount on Mountain Lion

I have the Western Digital My Book Studio II external hard drive.  It was working fine.  After upgrading to Mountain Lion, the disk does not mount.  I can't find any help on the Western Digital site.  Has anyone else run into this?  Is there a solution?
Immediately, I'm more concerned about getting the data off this drive than getting it to work.  If I take it to an Apple Store with another external drive, could they transfer the data to it for me?

Also, check the Western Digital website for software updates. They have made numerous updates recently.
http://support.wdc.com/product/download.asp?wdc_lang=en
Firmware update for Mac users
Mac release 3.1.0.10E (updated 9/4/2012)
See: http://www.wdc.com/wdproducts/wdsmartwareupdate/firmware.asp?id=wdfGeneric&os=ma c
WD Universal Firmware Updater Release Notes 1
WD Universal FW Updater 3.1.0.10E: Fixes:
• Added additional drive support.
WD Universal FW Updater 3.1.0.10D: Fixes:
• Now works with 10.8 Mt. Lion.

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