Tom Berkley wrote:
> 
> Mode 4 is UDMA 66
> Mode 2 is UDMA 33
> What UDMA 66 controller is in your box?

Not necessarily: UDMA 66 is _UDMA_ mode 4, but you also had
 _PIO_ modes 0,1,2,3 and 4 (before any UDMA was available).

Is it absolutely sure in this case, that the CDROM supports 
 _UDMA_  ??? (It may only support _DMA_ which is not the 
same thing).

As for myself I can choose in the BIOS (AWARD 4.51PG)
either PIO or UDMA (or AUTO) for each _device_, not
each _controller_. So I disabled UDMA for the CDROM on hdd,
but it is still active for both disks on hda and hdc.


-- 
Jean-Louis Debert        [EMAIL PROTECTED]
74 Annemasse  France
old Linux fan

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