When you run check image just what exactly is checked? Is it the file system, the data, missing data, new data not on the image? Then, what is it that causes a corrupt image during a check? What data may be missing, may be changed, may be added? Are file dates and times of any consequence? Unfortunately, I have found no comprehensive description of the actions of the check image program and am curious as to the actual processes it performs. Of course, some of this appears to be obvious, but, I'd like a further explantion if available. Thanks.