General Knoppix support for those who've read the FAQ at the Wiki
HGST Ultrastar HE10 HUH721010ALE600 10TB SATA 6Gb/s 7200RPM 3.5" Enterprise HDD
$74.99
HP Hard Drive Cage w/ Backplane 670078-001
$233.99
Seagate Exos 7E10 ST2000NM000B 2TB 7200RPM SATA 6.0Gb/s 3.5" Internal Hard Drive
$29.99
HGST Ultrastar DC HC520 12TB SATA 6Gb 256MB 3.5" Enterprise HDD- HUH721212ALE601
$82.99
2 PACK Seagate ST1000LM035 Mobile HDD 1TB 2.5" SATA III Laptop Hard Drive
$27.49
Western Digital WD5000LPLX 500GB 2.5" SATA 32MB 6Gb/s 7200RPM Laptop Hard Drive
$7.99
WD 16TB Elements Desktop, Certified Refurbished Hard Drive - RWDBWLG0160HBK-NESN
$174.99
Western Digital WD4000FYYZ RE 4TB 7200 RPM 64MB Cache SATA 6Gb/s 3.5" Hard Drive
$28.49