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