The backboard has all or some of the drive connectors on a front face thereof, arranged in {HEAD ~ a matrix configuration} having {TAIL ~ a plurality} of rows and a plurality of columns 
having
The backboard has all or some of the drive connectors on a front face thereof , arranged in { HEAD ~ a matrix configuration } having { TAIL ~ a plurality } of rows and a plurality of columns
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH