 "Western Digital Red 6 TB Internal HDD" " Western HDD - WD60EFRX Desktop Hard Drives CDW.com
"WD's exclusive NASware technology, built into every WD Red hard drive, improves NAS storage performance by reducing common hard drive concerns in NAS systems including concerns for things like compatibility, integration, upgradeability, reliability and cost of ownership that are experienced with a hard drive designed for desktop computers." 
 "Seagate 2TB 3.5" SATA3 BarraCuda HDD/Hard Drive ST2000DM006"@en ST2000DM006 LN74291 | SCAN UK"@en
"2TB Seagate ST2000DM006 BarraCuda, 3.5" HDD, SATA III - 6Gb/s, 7200rpm, 64MB Cache, 9.5ms, NCQ, OEM                      "@en 