Many people are confused about what the S.M.A.R.T feature in the BIOS actually does. There is a lot of misleading info on this function. First of all, eventhough your SMART function says “disabled” during post, it does NOT mean your hard drive’s internal function is not working. At any time, with the right application, you can access SMART attributes directly from your drive.
Do you really need that function in the BIOS on ? NO… Proof ? Well try installing SMART enabled tools and see for yourself, you can use the feature despite it being disabled in DOS.
SO…WHY is that feature there in the BIOS ? Simple.
S.M.A.R.T. option in BIOS is used for running a check during post. It will look for any critical attribute that has exceeded threshold, and if so will give you a warning, again, during post, before loading up windows. In other words this BIOS function should have been called “Check drive’s SMART status at startup” instead, to avoid confusion.
When leaving it off you simply disable the status check during post.
This is handy if you don’t have a SMART monitoring tool in windows or back in the DOS days, I guess this is an old, outdated BIOS function that has been kept there to accomodate everyone, however, personally, given the tons of free tools on the net, I leave the bios function DISABLED at all times since it is not as reliable - it will not tell you which attribute has gone over.
A GREAT tool called SpeedFAN has built-in SMART monitoring along with attributes and descriptions. It is a great tool !
To enable this, in your BIOS, you will need to go to your disk setup section, usually the first screen you see when you enter bios - where all your hard drives are listed. You simply select the hard drive and hit enter to get a new menu which shows the PIO/UDMA settings, etc… You will see a S.M.A.R.T option.
Personally I would recommend leaving it disabled for the reasons stated above.