I have a Rocketraid 2644 in a MAC Pro (early 2008) connected to an Addonics mini storage tower containing 4 x 1 TB drives in a RAID 0 array. The RAID array has been working OK but when I started up the MAC, the Addonics box started clicking & the arrays are no longer there. The MAC will not initialise the external drives in the Addonics box. It will not initialise any of them when inserted in one of the internal bays in the MAC. I tried them in an external USB drive box on a PC also but they won't initialise on that system either. Does anyone have any suggestions or are my drives junk? I have heard that once Rocketraid cards initialise a set of drives nothing else will initialise them. A good reason to beware if true. Thanks.