Well, is mentioning this even important? DUID use solves part of the problem, BIOS selection solves other parts of the problem, and I suspect the remainder of the problem is so machine-dependent that I wonder why it is documented..
> When first (re-) read I thought 'what? attaching an usb drive cannot > change other drives' - until I figured this was about boot time. > Say so: > > Marcus > > Index: faq14.html > =================================================================== > RCS file: /cvs/www/faq/faq14.html,v > retrieving revision 1.352 > diff -u -p -u -r1.352 faq14.html > --- faq14.html 4 Mar 2017 21:22:45 -0000 1.352 > +++ faq14.html 6 Mar 2017 20:38:37 -0000 > @@ -73,7 +73,7 @@ The devices are numbered by the order in > starting at zero. > So, the first IDE-like disk will be <tt>wd0</tt> and the third SCSI-like disk > will be <tt>sd2</tt>. > -Removing or adding a disk may impact the identity of other drives on the > system. > +Removing or adding a disk may impact the boot time numbering of other drives. > Note that OpenBSD will not necessarily number drives in the same order as > your > boot ROM.

