I have very good cooling in my mid-tower, but the (1TB) HDD is running at 50 degrees celcius. I see in the technical documentation that the drive is rated OK until 60 degrees, but conventional wisdom says 40 degrees is a more reasonable, desirable temperature for internal drives.
At the time of writing I had the SATA drive and two PATA drives in my mid-tower. I have since removed one of the PATA drives and connected externally it via a USB drive enclosure. The new SATA drive and remaining PATA are now running at 40 degrees celcius, so I’m wondering if overcrowding was an issue, even though the mid-tower has excellent ventilation.