{TAIL ~ The plurality} of drive connectors includes two first drive connectors, {HEAD ~ each first drive connector} connected to a user detachable media drive and located in a same column of the matrix configuration 
{ TAIL ~ The plurality } of drive connectors includes two first drive connectors , { HEAD ~ each first drive connector } connected to a user detachable media drive and located in a same column of the matrix configuration
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH