Today (5/2/2013) I actually did try running the Dell Diag's (I somehow managed to miss this option & for some reason I didn't see anything about it online either…maybe it's info overload blindness or something?) & here is what I got:
During the "Read Test" I got this:
Error Code: 0F00:0244
MSG: Block 177182: Uncorrectable data error or media is write protected
During the "Verify Test" I got this:
Error Code: 0F00:1A44
MSG: Block 177182: Uncorrectable data error or media is write protected
However, I am not sure this is the same thing you mentioned b/c the error codes I received do not match anything on the page you listed... Am I doing the right test?
Thank you so much in advance for all of your help!! ;o)