I would to connect additional HDD (with older installation of NetBSD) to
copy some files from. Surprisingly, such operation does turn my (formerly)
wd0 into wd1 - while system does want to see the new one as wd0. In a
consequence, i've got "unexpected inconsistency", "run ffsck manually",
"single-user mode (ro)" and so on.

It seems to be bad design; never had such problems under Linux, where my
main hdd is - and forever will be - "hde". Never mind, how many other disks
will be (dis)connected in the future.

A section "19.7. Adding a new hard disk" does not say anything about such
problem, http://www.netbsd.org/Documentation/misc/#adding-a-disk it's not an
answer as well. I don't want to make any changes in partitions, disklabels etc.
 - just want to connect a disk for a while, mount it somewhere, copy some data,
then disconnect it permanently, and put it away.

How it can be done is such simple way, as it used to be under Linux control?
Is it possible?
-- 
				pozdrawiam / regards

						Zbigniew Baniewski