What I ended up doing was hacking an /etc/disktab entry
based upon the zip100 one I found:

zip100|IOMEga Zip 100 MB Repository:\
        :dt=SCSI:ty=removable:rm#300:se#512:nt#32:ns#32:nc#192:\
        :pa#196608:oa#0:ba#4096:fa#512:ta=4.2BSD:\
        :pb#196608:ob#0:bb#4096:fb#512:\
        :pc#196608:oc#0:bc#4096:fc#512:\
        :pd#196608:od#0:bd#4096:fd#512:

zip250|IOMega Zip 250 MB Repository:\
        :dt=SCSI:ty=removable:rm#2941:se#512:nt#64:ns#32:nc#239:\
        :pd#489440:od#0:bd#4096:fd#512:

Then used disklabel to write based on this:

disklabel -r -w /dev/sd0d zip250 backup
newfs -m 1 /dev/sd0d

Unfortunately, I only ended up with 230 Mb.  So perhaps my
disktab entry needs tweaking?

Thanks,

Nancy
> 
> On Sun, 27 Aug 2000, Todd Whitesel wrote:
> > > > host# newfs -m 1 /dev/sd0a 
> > > > newfs: /dev/sd0a: open: Device not configured
> > > 
> > > 'a' is probably not the correct partition. Try sd0d.
> > > See http://www.netbsd.org/Documentation/misc/#using-zips for more info.
> > 
> > Partition 'a' works fine once the zip has been disklabel'd.
> 
> That's right - I'm assuming one uses pre-formatted ZIPs. The ones I've
> used so far have the MSDOS filesystem on some other partition.
> 
> 
>  - Hubert
> 
> -- 
> NetBSD - because Unix isn't just #include <linux.h>, i386, ILP32, ELF, ...!
>