[magicalhippo]

The ZFS project has a test suite[1], and as far as I can determine, nuking data is part of it. See for example the zraid_test tool[2], which seems to do what you suggest.

[1]: https://github.com/openzfs/zfs/tree/master/tests/zfs-tests

[2]: https://github.com/openzfs/zfs/tree/master/cmd/raidz_test (run_rec_check_impl etc)