Note: A physical hard drive can have up to 30 different attributes (the example above supports only 13). For more information, see How does S.M.A.R.T. function of hard disks Work? Note: The preceding link was correct as of September 2, 2014. If you find the link is broken, provide feedback and a VMware employee will update the link. A raw value can have two possible results: A number between 0-253