new PC disk problem?

[Peter S Galbraith <GalbraithP@dfo-mpo.gc.ca>]

I received a new Dell computer last week, and after a backup of
my system tar reported problems with one file.  While trying to
read that file, I get I/O errors:

 hda: read_intr: status=0x59 { DriveReady SeekComplete DataRequest Error }
 hda: read_intr: error=0x40 { UncorrectableError }, LBAsect=10360592, sector=4464737
 end_request: I/O error, dev 03:02 (hda), sector 4464737

Bad disk?
Should I contact Dell or test-torture it some more?