My external 2TB Western Digital external drive just vanished.

My external 2TB Western Digital just vanished as well. [I have read many posts very similar to mine in the MacRumors forums and also Western Digital forums.
I never installed any WD software when I purchased it , or since, but formatted the drive with 2 partitions as usual with Apple Disk Utility.
I have been using it for months and no problems. Then yesterday I tried to access the drive and it gave me the message "The disk you inserted was not readable by this computer" and asked if I wanted to Initilize it.
I then checked with Disk Utility and where I formerly had 2 partitions it showed only one and said it was empty!
No data at all!
I have been using this drive with OS 10.9.2 for a while, it was fine untill everything vanished yesterday.
I then updated to 10.9.3 but the drive is still 'gone'.
So far no fixes posted.
Help me Apple....what have you done?!?!!!
Adam
I have a MacBook Pro.

Apparently WD released a new WD 'Smartware' Version in 2013 to address this problem with Mavericks and WD External drives. I can find no confirmation from any source that this works and indeed many warnings against using any WD software for setting up or fixing their drives when used with Macs and Mavericks. Anyway...this is just for Smartware.
     http://wdc.com/wdproducts/wdsmartwareupdate/wdsmartware.asp?id=wdfGeneric&os=mac
I can find no Firmware updates for the issue anywhere.
Have filed a case with WD Support a couple days ago; still waiting for any response.
The MacRumors Forums, Western Digital's forums, and Apple's Support Communities all had threads about lost data after connecting Western Digital external hard drives to computers after updating to Mavericks.
WD is happy to announce the release of WD SmartWare Version 1.3.6 for Mac 10.5-10.9.
Fixed an issue related to reports of some customers, under certain conditions, experiencing data loss when updating to Apple's OS X Mavericks (10.9).
The WD SmartWare update is available for download from Western Digital's website.

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