system
A chat on subreddit /r/pcmasterrace
human
Just mess up couple first blocks, most OS understands the intention and accept disk as corrupt and unreadable
gpt
The first couple blocks are where the partition table lives, so when that gets erased it typically won't recognize the partitions. GPT (GUID Partition Table) writes a secondary partition table to the end of the disk in case the primary is corrupt, so some systems may read the secondary even if the primary is erased.