alphaserver 2100 5/250 with promise pci ide controlor

[Francisco José Nina Rente]

Hi all,

I'm trying to install FreeBSD 6.2 with GENERIC on a alphaserver 2100  
5/250 with a promise pdc20269 ide controller.
The objective it's to use one of the scsi disk on the system to boot  
and have the rest of the OS on the to ide disks in RAID 1.
My Problem is:

1- When i boot the freebsd cd normally i get this messages:

ad0: TIMEOUT - READ_DMA retrying (1 retry left) LBA=0
ad0: TIMEOUT - READ_DMA retrying (0 retries left) LBA=0
ad0: FAILURE - READ_DMA timed out LBA=0
ad1: TIMEOUT - READ_DMA retrying (1 retry left) LBA=0
ad1: TIMEOUT - READ_DMA retrying (0 retries left) LBA=0
ad1: FAILURE - READ_DMA timed out LBA=0

And i can eaven see the disk geometry in the label tool of sysinstall.

2 - If i set hw.ata.ata_dma=0 on the boot, the messages disappears.  
If i switch from mode PIO4 to udma33 or udma66 with atacontrol there  
is no problem, at leas i can label the disk normally,
But in this case only one of the disk can be accessed, only ad0!  
Because if i try to use disklabel on ad1 the above message appear again!
If i change to udma100 (the maximum that is supported by the two  
disks) the same message appears.

3- I boot with set hw.ata.ata_dma=0 and i change to udma66, when i  
start the installation i get a panic.


I don't want to use less then udma66, of course :(
I already try various cable (all 80 conductor cable ).
When i try to use the same promise pdc20269 ide controller in a  
regular x86 box it works normally.

Another question what i need to do to force udma66 on boot?

Anyone can help me, please?

Thank you in advance.
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