>I mount ZIP disks with no disklabel on them from time to time myself.
>I suspect what the driver is (should) be doing is assuming the msdos
>partition starts at sector 0, which a zip disk without a partition
>table would do.  I don't think I partitioned any of the zip disks I
>have.

The zip disks that I have came formatted with a standard DOS partition
table with fake 64H/32S geometry and one nonemoty partition (the last
entry in the table) at offset 32, and a DOS file system in that
partition.

Bruce