Problem Every couple of minutes my HDDs start cranking like they are accessing files, but as far as I know, they shouldn't be. It sounds as if you are defragmenting a drive but maybe a little bit more faint. To get it to stop, sometimes I can go to explorer and click through some of my directories and when I go two folders deep the sound will stop. Background I recently changed the fan in my psu and did some configuration changes in order to quiet down my pc. I would say it's about 25% of how loud it used to be. Either this problem started around the same time I did this, or now I notice it more because my fans are so much quieter. My system is an old but stable abit board with a 3000+ and a gig of ram running xp pro 32bit. It's overclocked to 2.4. I have 5 HDDs in my box right now and this is the configuration: C: - system - 74gig seagate sata D: - empty - 74gig seagate sata E: - file storage - 74gig western digital ide F: - downloads - 300gig western digital sata G: - storage - 300gig seagate sata The first thing I thought was that it was windows indexing files, which would make sense. Then I checked my services and I had indexing disabled. Then I thought maybe system HDD was going bad so I ghosted the C drive and switched it with D. Now those two drives are swapped andI unhooked D (old C) to make sure that drive wasn't going bad. The problem still occurs. I tried a sysinternals program called file monitor to see what the HDDs were actually accessing and it looked like they were not being accessed at all. I have tried installing vista on a separate HDD and the problem still occurs so I don't think it's related to the OS, but I don't know. Maybe windows spins up the drive every once and a while? Maybe I'm crazy and never realized this was a normal sound that HDDs make. It's just frustrating to hear how silent it is normally then every few minutes it's cranking away like it's doing something in the background. I want to know why it's doing this to either stop it, or understand it I'm at a loss as to what to try next. I'd appreciate any troubleshooting help I can get.