chatgpt o1 generated script to cleanup after ceph on drives which have already have the partition table removed by kickstart.

gistfile1.txt

#!/usr/bin/env bash

# WARNING: This operation is destructive and will overwrite data on the device.
# Ensure you really want to overwrite these drives.

for dev in $(lsblk -dn -o NAME | grep '^nvme'); do
    # Capture parted output (quiet mode) and return code
    parted_output=$(parted -s "/dev/$dev" print 2>&1)
    parted_status=$?

    if [[ $parted_status -ne 0 ]]; then
        # parted returned an error => no recognized partition table
        echo "/dev/$dev has NO recognized partition table"
        echo "Wiping first 1GB of /dev/$dev..."
        dd if=/dev/zero of="/dev/$dev" bs=1M count=1024 status=progress
    else
        # parted succeeded => check if there are zero partitions
        # Look for lines that start with a digit (e.g. " 1 ") in parted output
        partitions_count=$(echo "$parted_output" | grep -E '^[[:space:]]*[0-9]+' | wc -l)
        if [[ $partitions_count -eq 0 ]]; then
            echo "/dev/$dev has a partition table but NO partitions"
            echo "Wiping first 1GB of /dev/$dev..."
            dd if=/dev/zero of="/dev/$dev" bs=1M count=1024 status=progress
        fi
    fi
done