Fill a drive with random data

filldrive

#!/bin/bash

ruby "$(dirname "${BASH_SOURCE[0]}")/filldrive.rb" $@

filldrive.rb

current_dir = `pwd`.strip
# Ensure we're filling a drive in /Volumes, (and not Macintosh HD!!!)
if current_dir.start_with?("/Volumes") == false
    puts "Please run this script from a directory in /Volumes"
    exit
elsif current_dir.include?("Macintosh HD")
    puts "Please don't run this script from the Macintosh HD directory!"
    exit
end

gigs = ARGV[0].to_i
puts "Filling drive with #{gigs} gigs of data"
puts "This will take a while..."
# Create files with random sizes from 1MB to 1GB, until target size is reached
total_size = 0
while total_size < gigs * 1024
    size = rand(1024) + 1
    total_size += size
    puts "Creating file of size #{size}MB, total size: #{total_size}MB"
    `openssl rand -out fillsample#{total_size}.txt -base64 #{2**20 * size}`
end
puts "Drive filled with #{total_size}MB of data"