General Knoppix support for those who've read the FAQ at the Wiki
WD HDD Ultrastar DC HC520 HUH721212AL4205 12TB 3.5" SAS Server Hard Disk Drive
$45.12
Seagate ST8000NM0055 8TB 7200RPM 256MB SATA 6.0 Gb/s 3.5" Enterprise Hard Drive
$41.48
HITACHI HUS724040ALA640 4TB 7200RPM 64MB SATA 6.0Gb/s 3.5" HARD DRIVE ZERO HOURS
$52.00
Western Digital WD4000FYYZ RE 4TB 7200 RPM 64MB Cache SATA 6Gb/s 3.5" Hard Drive
$24.01
HGST Ultrastar DC HC520 12TB SATA 6Gb 256MB 3.5" Enterprise HDD- HUH721212ALE601
$89.99
HGST Ultrastar HE10 10TB SATA 6.0Gb/s 7200 3.5" Datacenter HDD - HUH721010ALE601
$69.99
WD Ultrastar DC HC530 14TB SATA 6G 3.5" 7200RPM Enterprise HDD - WUH721414ALE604
$109.00
Seagate ST12000NM0127 12TB SATA 6Gb/s 256MB 7200RPM 3.5" Enterprise Hard Drive
$99.99
Seagate ST8000NM0055 8TB 7200RPM 256MB SATA 6.0 Gb/s 3.5" Enterprise Hard Drive
$34.20
Seagate Enterprise Capacity 8TB 7200 RPM Internal Hard Drive ST8000NM0045
$147.99