Issues relating to HDD Installs. Once you have installed Knoppix, it basicly becomes debian, so you should check out www.debian.org for information.
1U Supermicro Server 10 Bay 2x Intel Xeon 3.3Ghz 8C 128GB RAM 480GB SSD 2x 10GBE
$273.00
HP ProLiant MicroServer Gen8 G8 G2020T 8GB RAM 4x 1TB HDD 4x 3.5" 712318-421
$279.99
Supermicro SYS-6019P-WTRT w/X11DDW-NT 4x 3.5" 2x LGA-3647 CTO 1U Server w/Rails
$549.90
1U BareMetal pfsense opnsense Router Firewall DNS Server 6x 10GB Ethernet Ports
$149.00
HPE ProLiant MicroServer Gen10 Plus v2 Ultra Micro Tower Server - 1 x Intel Xeon
$846.48
Supermicro Server 505-2 Intel 2.4GHz 16GB SYS-5018A-FTN4 - pfSense Compatible
$220.48
DATTO-1000 Mini PC Micro Server 8GB RAM
$67.48
HP ProLiant MicroServer Generation 8 Xeon 16Gb 4-BAY 16TB HDD (4 x 4TB) included
$490.00
1U SFF Supermicro Server X10DRW-iT 2x (Xeon 36 Cores) 128GB 2x PCI-E X16 Slots
$379.00
Rackmount Server MSI MS-9211 powers on micro-star international
$199.00