3 ms·

No, it is O(n) vs O(1). Why would you read 512G + 512 bytes if you only need to read 512 bytes at offset 512G?

• fbn79 4y ago
  I think you can just invert and do tail first sudo tail -zc +513 /dev/sda | head -c 512 > /tmp/boot.2
  • jstimpfle 4y ago
    Well now you're seeking to the offset (tail is).