Did it give you any more details about what failed in the SMART test? Usually by the time a manufactor utility warns you about a SMART error, there is more than one reallocated sector on your hard drive.
Download, install and run GSMARTControl. It should show a little icon of a hard drive in the window that opens. Doubleclick on the icon, then click on the attributes tab at the top. It will show a table. Let me know the numbers in the Raw Value column for the following rows: Reallocated Sector Count, Power On Time, Spin-Up Retry Count, Current Pending Sector Count, and anything it highlights in red. The Dell utility is probably reading the number from the reallocated sector count, or possibly the current pending sector count.
Edited by Trevorever, 12 April 2014 - 06:19 PM.