Switch the GENERIC kernels for all architectures to the new CAM-based ATA stack.
http://lists.freebsd.org/pipermail/svn-src-head/2011-April/026801.html

ついに危険なアップデートｷﾀｰ

> If you are using ATA device names in /etc/fstab or other places,
> make sure to update them respectively
> (adX -> adaY, acdX -> cdY, afdX -> daY, astX -> saY,
> where 'Y's are the sequential numbers for each type in order of detection,
> unless configured otherwise with tunables, see cam(4)
> ).
>
Yを決める検知順がよくわからんが、惨事が起きそうｗ
使ってるのがSCSIなdaXなら関係ない話だよな。