do i need ata with twe?

[Randy Bush]

if i have sata with twe, and only have ata cdrom,

    ata0: at 0x1f0 irq 14 on atapci0
    ata0: [MPSAFE]
    ata1: at 0x170 irq 15 on atapci0
    ata1: [MPSAFE]
    fdc0: <NEC 72065B or clone> at port 0x3f0-0x3f5,0x3f7 irq 6 drq 2 on isa0
    fdc0: FIFO enabled, 8 bytes threshold
    fd0: <1440-KB 3.5" drive> on fdc0 drive 0
    acd0: CDROM <CD-224E> at ata1-master PIO4
    twed0: <Unit 0, TwinStor, Normal> on twe0
    twed0: 70910MB (145224064 sectors)
    twe0: command interrupt

how much of the ata kernel can i eliminate?  can i cut down to

    # ATA and ATAPI devices
    device              ata
    #device             atadisk         # ATA disk drives
    #device             ataraid         # ATA RAID drives
    device              atapicd         # ATAPI CDROM drives
    #device             atapifd         # ATAPI floppy drives
    #device             atapist         # ATAPI tape drives
    #options    ATA_STATIC_ID           #Static device numbering

randy