> prie ko čia "šie laikai", jei tas D20 iš akmens amžiaus?

gal bronzos ar koks ten po akmens amziaus ejo?..
http://knowledge.seagate.com/articles/en_US/FAQ/218615en
Intel RAID does not yet support disk drives greater than 2.2TB.

ICH10R paskutinis matkes "pietinis tiltas"
o ten dar marvell'is atitinkamos eros..
https://support.lenovo.com/lt/en/downloads/ds000898

Plius:
Attention: Your computer supports both SAS hard disk drives and SATA 
hard disk drives. However, be sure that you do not install both the SAS 
and SATA hard disk drives into the same computer.

Yra kazkokiu variantu isjungt integruota Marwell ir kist
padoru RAID kontroleri (gal koki siuolaikini LSI SAS'a)
https://forums.lenovo.com/t5/ThinkStation-Workstations/Thinkstation-D20-Problem-After-Installing-Sata3-Card-Expansion/td-p/3773000