TestScript

 randAdrs = ""
 k = 1
 while true do
  for i = string.len(randAdrs), 8 do
   if math.random(1, 2) == 1 then
    randAdrs = randAdrs .. string.char(math.random(48, 57))
   else
    randAdrs = randAdrs .. string.char(math.random(65, 90))
   end
  end
  if string.len(randAdrs) < 9 then
   print("Failed")
  else
   print("Storing "..randAdrs)
   adrsTab = {}
   if fs.exists("adrsStorage") then
    adrsTab = textutils.unserialize(fs.open("adrsStorage", "r").readAll())
   end
   for i,v in pairs(adrsTab) do
    if v == adrsTab then
     found = true
    end
   end
   table.insert(adrsTab, randAdrs)
   tab = fs.open("adrsStorage", "w")
   tab.write(textutils.serialize(adrsTab))
   tab.close()
   randAdrs = ""
   k = k + 1
   if k == 400 then
    os.reboot()
   end
  end
  sleep(0.001)
 end