pinning down dk? assignment

[Edgar Fuß <ef%math.uni-bonn.de@localhost>]

Can I somehow pin down which dk? gets assigned to which GPT partition?

In a disklabel world, I have components sd2a..sd6a making raid1.
I then have raid1a mounted on /export/home and raid1e on /export/mail.

In a GPT/wedge word, I have dk0..dk4 (on sd2..sd6) making raid1.
I then have dk5 and dk6 on raid1 mounted on /export/home resp. /export/mail.

Now suppose the machine comes up with sd6 failing to attach.
At that time, I have dk0..dk3, which (plus an absent dk4) will build raid1.
I then get dk4 and dk5 on raid1 and the mail fs mounted on /export/home.