ceph@ceph-test:~/my-cluster$ ceph osd pool delete cephfs_data
Error EPERM: WARNING: this will *PERMANENTLY DESTROY* all data stored in pool cephfs_data.  If you are *ABSOLUTELY CERTAIN* that is what you want, pass the pool name *twice*, followed by --yes-i-really-really-mean-it.
ceph@ceph-test:~/my-cluster$ ceph osd pool delete cephfs_data cephfs_data --yes-i-really-mean-it
--yes-i-really-mean-it not valid:  --yes-i-really-mean-it not in --yes-i-really-really-mean-it
Invalid command:  unused arguments: ['--yes-i-really-mean-it']
osd pool delete <poolname> {<poolname>} {--yes-i-really-really-mean-it} :  delete pool
Error EINVAL: invalid command
ceph@ceph-test:~/my-cluster$