T40 bootloop on CAM status: Command timeout on both 10.1 and -CURRENT

[Wolfgang Zenker]

Hi,

* bsdml <pietro.bsdml at gmail.com> [150329 01:34]:
> since I tried to install FreeBSD 10.1 on my recently purchased T40 I got 
> stuck at this annoying bootloop that says
> "ATAPY_IDENTIFY. ACB: a1 00 00 00 00 40 00 00 00 etc etc.. CAM status: 
> Command timeout". I have also tried latest 11-CURRENT snapshot and it 
> did not make any difference at all, it is affected from the same exact 
> bootloop.
> [..]
> It seems like there might be an issue with the CAM ATA stack that is 
> clashing with the PATA controller on my T40.

I had the same problem on an ancient T42p. In my case, disabling the
second ata channel allowed me to boot.

I added the following line to /boot/device.hints:
hint.ata.1.disabled="1"

Wolfgang