Ok, I've solved it. In my BIOS I have an option...
Enhanced Mode Support On:
I had it set to "P-ATA+S-ATA". I changed it to S-ATA. It worked. I don't
know why it worked for 8.04 regular kernel and not rtai. I have 2 sata hard
drives, and an IDE DVD.
> I've been trying to install EMC2 on Ubuntu 8.04.
>
> I installed 8.04 without any problems. I ran update and all
> the updates installed.
>
> I then ran the emc sh install. It appeared to install fine.
>
> When I rebooted and selected the rtai kernel, I get a prompt...
>
> (initramfs)
>
> and the following message repeated...
>
>
> [XXX.XXXX] ata2.01: exception Emask 0x0 SAct 0x0 SErr 0x0
> action 0x2 frozen [XXX.XXXX] ata2.01: cmd
> a0/00:00:00:24:00/00:00:00:00:00/b0 tag 0 pio 36 in
> [XXX.XXXX] ata2.01: status: { DRDY }
>
>
> If I try and boot the EMC2 Ubuntu 8.04 cd image, I get the same thing.
>
> Is ata2.01 my disk, or disk controller? Why doesn't the rtai
> kernel like it?
>
> Any ideas?
>
> Thanks,
> Frank
>
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