Critical error bay 5 mSATA drive

On a brand new 5N2 with a brand new Kingston 120GB mSATA I experienced a critical drive error. In order to exclude death on arrival error, I inserted the mSATA in bay 5 the so called accelerator bay. In dashboard it showed good and 100% live. So I continued the new installation and after inserting the 2TB WD red HD’s, a critical error occurred, not for any of the HD’s but for the mSATA. So i removed the HD’s en the mSATA showed 100% live again. Inserting the HD’s reproduces the critical error. The drobo installation guide does not provide a solution for this flaw.