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 {TAIL ~ a same column} of the matrix configuration 
located in
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 { TAIL ~ a same column } of the matrix configuration
OTH OTH 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 REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH