#!/bin/bash
SUPERBLOCKS="32768 98304 163840 229376 294912 819200 884736 1605632 2654208 4096000"

echo "strat superblocks..."
for sb in $SUPERBLOCKS; do
    echo ""
    echo "========================================"
    echo "read superblocks: $sb"
    echo "========================================"
    
    e2fsck -n -b $sb /dev/vda 2>&1 | head -10
done