First of all, the drives that you are using i.e. ST3500320AS is not supported by SS4200-E, therefore Intel as it clearly states under THOL would not support any incompatible parts not tested or verified by Intel.
Furthermore, when formating the drives, the drives should be clean having no partitions on it whatsoever. I had once replied to the same problem in another thread that you would want to read in detail here for a better understanding on this and it's resolution: HOW TO RESOLVE BLINKING LIGHTS PROBLEM AND FORMATTING DRIVES FOR SS4200-E
I hope this helps however if you still have any queries or require help, let us know and we'll be glad to support you in every way possible.
Thank you and have a great day!
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