This is a bad idea.

If you want repair, you need to either set more than one copy in ZFS (still pretty dumb) or use multiple drives in a raidz (or mirror, though raidz is more efficient).

When you try to partition a drive like this (or configure ZFS to write multiple copies) you loose everything in the event that the whole drive fails. Honestly, it's a far better plan to just use multiple drives in a raidz so that whole-drive failures can be reconstructed in addition to data corruption.