How to Force UDMA100 Mode on Boot?

Fabian Keil fk at
Wed Aug 17 11:56:49 GMT 2005

jason <jason at> wrote:

> Also if I don't have a cd in the drive I get "acd0: CDRW <LITE-ON 
> LTR-40125S/ZS0K> at ata1-master PIO4" for acd0.  If there is a disc in 
> the drive it is set to UDMA66 at boot up.   Or first use  if it was not 
> in at boot.

You're using an older FreeBSD version right?

This looks like
which was fixed a while ago.


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