Booting with multiple RAID1 configs

[Steve Bertrand]

Hey all,

I've been running my 4.11 box on a Promise RAID one card with no
difficulty.

Today I added 2 new disks to the regular IDE chain, and used atacontrol
to create a second RAID1 configuration for those 2 new disks. After I
created with atacontrol, it successfully told me an 'ar1' had been
created. (ar0 is the promise card).

However, after reboot, FBSD is trying to configure the new disks as ar0,
and the originals as ar1, causing a mountroot problem.

Manually typing ufs:/dev/ar1s1a fails as well with "Root Mount Failed:
22".

This can be fixed simply by removing the 2 new disks.

In the docs, I found how to boot by telling the os something like this:

1:ad(2,a)kernel, however I don't want to boot from an individual disk.
It must be the promise card.

I'd appreciate it if someone can help me sort this out!

Steve