Hard Drives by brand:

Seagate - 0.95% (1.44%)
Hitachi - 1.16% (2.40%)
Western Digital - 1.19% (1.55%)
Toshiba - 1.54% (1.15%)

2TB Hard Drives:

Seagate Constellation ES ST2000NM0011 - 9.64%
Western Digital Caviar RE4 WD2003FYYS - 3.38%
Seagate Barracuda Green ST2000DL003 - 2.36%
Western Digital Caviar Black 2 WD2002FAEX - 1.45%
Western Digital Red WD20EFRX - 1.45%
Seagate SV35 ST2000VX000 - 1.38%
Western Digital Green WD20EZRX - 1.35%
Seagate Barracuda 7200.14 ST2000DM001 - 1.12%
Western Digital AV-GP WD20EURS - 1.09%
Western Digital Caviar Green WD20EARX - 0.96%
Western Digital RE WD2000FYYZ - 0.83%

3TB Hard Drives:

Western Digital Red WD30EFRX - 1.99%
Western Digital Green WD30EZRX - 1.48%
Seagate Barracuda 7200.14 ST3000DM001 - 1.29%