ThinkComputers.org posted a review on the Revoltec HDD Silencer

Today for review I have the Revoltec Hard Drive Silencer, most hard drives claim to be quiet but not many really are, or they are quiet at idle but get loud when being accessed and who really wants to hear their hard drive rattling around in their case? Not me, I like me system quiet. Last year I purchased a Maxtor 200Gig SATA drive, yes it's silent at idle, but when it really gets going you can hear it rattling around in their, I learned to ignore it eventually but now I can silence it for good!

Revoltec HDD Silencer Review