Script to verify your storage device is writing bits correctly

verify-zeros.sh

#!/usr/bin/env bash

file=${1-zeros}

function write(){
  dd if=/dev/zero bs=4M count=1 2> /dev/null  > "$file" # Write zeros
}

function verify(){
  while IFS= read -r line; do
    if [[ "$line" != "00000000" ]]; then
      echo "Error: $line"
      exit 1
    fi
  done < "$file"
}

function Main(){
  write
  verify
  echo "All zeros verified successfully!"
}

Main

In practice, you'd want to test the entire drive, which would overwrite the partitions.

Wanted to verify something and wrote a couple of quick and dirty scripts for this.