dmesg...

atapci0: <VIA 6420 SATA150 controller> port 0xeb00-0xeb07,0xe000-0xe003,0xe100-0xe107,
0xe200-0xe203,0xe300-0xe30f,0xd400-0xd4ff irq 20 at device 15.0 on pci0
ata2: <ATA channel 0> on atapci0
ata3: <ATA channel 1> on atapci0
atapci1: <VIA 8237 UDMA133 controller> port 0x1f0-0x1f7,0x3f6,0x170-0x177,0x376,0xe500
-0xe50f at device 15.1 on pci0
ata0: <ATA channel 0> on atapci1
ata1: <ATA channel 1> on atapci1

[midget 10:24] ~ >sudo atacontrol list
Password:
ATA channel 0:
    Master:      no device present
    Slave:       no device present
ATA channel 1:
    Master:      no device present
    Slave:       no device present
ATA channel 2:
    Master:      no device present
    Slave:       no device present
ATA channel 3:
    Master:      no device present
    Slave:       no device present