Hello Wojciech!

  WP> did you disklabeled it before?

No, none of the Zip disks I'm using at present have
disklabels.  That may change now that I'm able to use Zip
disks to move data between NetBSD sites.

Ken Wellsch sent me some useful suggestions via email, and I
have been able to figure out that sd0h is the one I was
after.  Thanks for your suggestion too Wojciech!

Regards,
  - Andy.