nefungujici stary IDE disk

[Radim Kolar]

mam tu stary 800MB IDE disk, ktery nefunguje ve freebsd. Disk je okay v dosu i
v linuxu funguje.  disk neumi dma (ani v linuxu), ale reportuje jej.

atacontrol cap na nej da:

ATA channel 0, Master, device ad0:

ATA/ATAPI revision    0
device model          WDC AC2850F
serial number         WD-WM3130988929
firmware revision     28.25E40
cylinders             1654
heads                 16
sectors/track         63
lba supported         1667232 sectors
lba48 not supported
dma supported
overlap not supported

Feature                      Support  Enable    Value   Vendor
write cache                    no       no
read ahead                     no       no
dma queued                     no       no      0/0x00
SMART                          no       no
microcode download             no       no
security                       no       no
power management               no       no
advanced power management      no       no      0/0x00
automatic acoustic management  no       no      0/0x00  0/0x00

pri pristupu bez dma (hw.ata.ata_dma=0) to hazi
ad0: FAILURE - READ status=59<READY,DSC,DRQ,ERROR>
error=4<ABORTED> LBA=1
ad0: FAILURE - READ status=59<READY,DSC,DRQ,ERROR>
error=4<ABORTED> LBA=2
ad0: FAILURE - READ status=59<READY,DSC,DRQ,ERROR>
error=4<ABORTED> LBA=1

pristup s povolenym dma
ad0: 814MB <WDC AC2850F> [1654/16/63] at ata0-mast
er WDMA1
ad0: FAILURE - READ_DMA status=59<READY,DSC,DRQ,ER
ROR> error=4<ABORTED> LBA=1
ad0: FAILURE - READ_DMA status=59<READY,DSC,DRQ,ER
ROR> error=4<ABORTED> LBA=2
ad0: FAILURE - READ_DMA status=59<READY,DSC,DRQ,ER
ROR> error=4<ABORTED> LBA=1

Da se dma povolovat per disk jinak nez pomoci atacontrol 1 mode? Ja bych to
potreboval uz pro bootovani.