Macbook Pro Retina & Mediasonic ProRAID USB 3 issue - Error Code -50

Hi everyone,
I have a Mediasonic ProRAID 4-bay container (model HFR2-SU3S2) connected to my new Macbook Pro Retina via USB 3.0 (using the replacement pc board supplied by Mediasonic that provides true USB 3 speeds for supported apple devices). It is currently connected through a USB 3 hub but the same issue occurred when I had it directly connected to the laptop.
I've noticed that when the laptop display goes to sleep (beyond the screen saver), when I return to do work and wake the display (a Dell 3011 30" connected using the apple dual link mini display adapter), the drive is mounted and I can browse the folder structure without a problem.
However, whenever I do anything to write to the volume, like to create a folder, I get 'Error Code -50', preventing me from writing. Similarly, if I try to work on an image stored on this volume from within Adobe Lightroom, for example, I get Write error messages as well.
I've found that the only short term fix is to unmount and powercycle the RAID box. Are there any other remedies that I can look into? I have my Macbook Pro configured to NOT spin down any hard drives nor does it go to sleep (other than the display) when connected to AC power.
Thanks in advance for any help!

Your still within your 14 day no question asked return period.
IMO, I'd return it for a refund and BTO the 15.4" MB Pro without retina.
1. High Resoulution Antiglare WS (1680X1050)
2. Upgraded 7200 RPM drive (upgrade to SSD later)
I've read lots of post (here) about issues with the 1st Gen rMBP.
I've also read lots of positive articles in favor of the rMBP.

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