|With a platter drive not SSD, the noise is reduced marginally with a defrag because the drive does not have to work as hard to find data.|
If your hdd is making exceptrional noise it is because it is an old drive that has been used extensively and is nearing its "use by date" or it has a fault in the mechanism. You should back up the drive periodically to an external hdd if you have data that is of importance to you. Purchase a new drive when possible and do a Files & Transfer to the new drive.
In ther meantime, do a CHKDSK /F in the cmd run box dialog to check and fix the drive of errors. If you have any bad sectors, the OS will kick up errors about Page_Fault.
Usually, though, if you do extensive programming or Video editing/compiling, those type of projects do give harsh impact on a hdd as it is using a lot of resources to do the chore so you will hear a type of grinding or whirring noise during the compilation.
Also, too many Virtual drives will also give problems to a hdd as the virtual drives do exist as part of the "Free Space" of a hdd.
As well as, if you run your PC as a server for games then that, too, will impact on the hddd and its capabilities to cope.
If the Defrag Analyse shows only 10% fragmentation then it is advisable to do a defrag even though the message syas it is not warranted. 10% is rather a large amoun lkike an 80gb hdd, it would be 8gb of fragmentations. Better to defrag a small amount (might take about 5 to 20 minutes) than waiting for 6 hours to defrag at 30% or more.
Try to ensure that your Primary drive has at least 15% Free Space to allow proficiency of the OS.