4.2. What SCSI controllers are supported?

FreeBSD supports the following SCSI controllers:

Adaptec

AH-154x Series <ISA>
AH-174x Series <EISA>
AH-152x Series <ISA>
Sound Blaster SCSI (AH-152x compat) <ISA>
AH-2742/2842 Series <ISA/EISA>
AH-2820/2822/2825 Series <VLB>
AH-294x and aic7870 MB controllers <PCI>

Buslogic

BT-445 Series <VLB> (but see section on 32 MB machines )
BT-545 Series <ISA>
BT-742 Series <EISA>
BT-747 Series <EISA>
BT-946 Series <PCI>
BT-956 Series <PCI>

Future Domain

TMC-950 Series <ISA>

PCI Generic

NCR 53C810 based controllers <PCI>
NCR 53C82x based controllers <PCI>

ProAudioSpectrum

Zilog 5380 based controllers <ISA>
Trantor 130 based controllers <ISA>

Seagate

ST-01/02 Series <ISA>

UltraStor

UH-14f Series <ISA>
UH-24f Series <EISA>
UH-34f Series <VLB>

Western Digital

WD7000 <ISA> <No scatter/gather>