HDCK is finding problems in drives that can't be found elsewhere. HDCK labeled a drive "Critical" that was not showing problems with any other test. The drive in question was a brand new drive right out of the box. The Manufacture's tool, Badblocks, and Smartmontools (S.M.A.R.T) test found no problems with this drive. On another drive that has been constant use for about two years. HDCK reported that the drive was "Bad" again Manufacture's diagnostic, Badblocks, and Smartmontools found no problems.