Shift ada device numbers?

[Luciano Mannucci]

Hello all,

I have a FreeBSD 10.3 RELEASE machine whith root on zfs on two discs
and a "standalone" SSD holding database data. I noticed that if I move
the SSD disk to another SATA controller it becomes ada0 and the members
of the zfs are shifted to ada1 and ada2, and the system doesn't work:
in fact it stops at boot because I've put the swap on the ssd and it
can't find it anymore.

Is there a way to control whichnumbers are assigned to the disks at
boot time?

Many thanks,

Luciano. 
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