Mac Mini and WD My Book Duo RAID drives not mounting?

I have two of these My Book Duo drives connected via USB to my Mac Mini (late 2012), running OSX 10.9.5.
The drives are both configured as RAID 1, one has my iTunes and other media, the second one is the Time Machine backup disk. Last night when I restarted my computer neither drive mounted. I got an OSX error "THe disk is not readable" and a WD error "RAID stripe set has failed" box.
When I open the WD drive utilities I can't run any of the Diagnostics and the RAID Management tab says "RAID Status: Unknown" and suggests that I re-configure the drives.
I don't want to do that, obviously, as there is a total of over 3TB of data on both drives! It's suspicious that BOTH drives failed to mount at the same time... sounds like some software problem perhaps? I am posting here because it might be an OSX or local software problem?
I have updated the firmware on both drives and power-cycled them, restarted the computer several times, the usual things, but no luck. On a whim I tried updating the firmware a second time and got a different error in the firmware updater: "The drive is locked."
Any thoughts on what I could try? I've opened a Support Case with WD but oftentimes other users can be even more helpful! ;-)
Thanks, David

Hi, Thank you for the reply but I am definitely exactly one of those more Enterprise customers and my point is that your implementation is flawed and should be fixed because of course one of the reasons I bought the WD My Book Duo is because of encryption, but I want to own my encryption key and be able to decrypt my own data not have it hijacked. So I'm a little bit confused by your answer, is the official WD response that it acknowledges the worrysome problems I outlined but that there will be no plan to fix these issues? I am an IT consultant myself making recommendations for clients especially dealing with security. How can I recommend to "anyone" to use a product that seems to not care about preventing unnecessary data loss. It is not impossible nor even difficult for WD to fix this problem, to allow customers to access their own data off of their hard drives in case their "drive enclosure" develops problems or 'dies'. As I have already outlined, there are at least two ways or more that WD can fix this: 1. Allow enabling or disabling of the Encryption.And/OR2. Allow Exporting/Saving of the Encryption Key which we can then use with software to decrypt our hard drives in case of problems arising with our drive enclosure. Ideally the solution should include method #2 listed above so that we can enjoy the Encryption feature for which we purchased your products with assurance that we will NOT be locked out of our data for no good reason. I hope WD will consider taking a close look at this issue since it may at some point find itself with a lot of very angry customers when their WD My Book duos or other similar encrypted "drive enclosures" fail and people end up with perfectly functioning hard drives with data on them that they won't be able to access. Looking forward to a solution.

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Hello macfar14. Welcome to the Apple Discussions!
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On prodesigntools.com
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