I have found DTEMP fine for displaying IDE drive temperature and
SMART attributes on Windows taskbar :
But this isn't working for my SCSI drives. Your milage may vary.
Best bet may be trial of SanTools SMARTMon ...
But if all else fails ... download IBM Drive Fitness Test
and create a boot disk from it. After running the test,
DFTVIEW will format the results, including max drive temperature.