Design some Icons

I need 6 Icons for different "generic" NAS Server models. Front view (please no side views!) Please get inspired by the most common brands like "QNAP" or "Synology" or "Buffalo" 1) Desktop NAS (with 1 hard drive Slots) 2) Desktop NAS (with 2 hard drive Slots) 3) Desktop NAS (with 4 hard drive Slots) 4) Rackmount NAS 1 height unit (with 4 hard drive slots, vertically) 5) Rackmount NAS 2 height units (with 8 hard drive slots, vertically, 2 rows) 6) Rackmount NAS 3 height units (with 12 hard drive slots vertically, 3 rows) the icons should be as simple as possible and in a vector format (eps / ai)