[ILUG] hdparm and DMA "not permitted"

[John McCormac]

Vincent Cunniffe wrote:
> 
> Conor Daly wrote:
> 
> > Little problem here with hdparm and DMA.  I'm using an AMD K6-2 350MHz on
> > some kind of amibios mobo with "Ultra DMA Enabled" in CMOS but I cannot
> > set "using dma" for the drive(s).
> 
> <snip>
> 
> > hda: Maxtor 91021U2, ATA DISK drive
> > hdb: FUJITSU MPD3084AT, ATA DISK drive

If the HD is a UDMA66/33 and there is a non-UDMA66/33 device on the same
chain it can cause problems. The best thing would be to keep the UDMA
devices on IDE0 and the non UDMA devices on IDE1. 
 
Regards...jmcc
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