ST3320620ASThe Seagate ST3320620AS is a 320GB hard disk from the 7200.10 series.

  • 7200.10
  • 7200rpm
  • 320GB
  • Perpendicular Recording
  • 16MB cache
  • Whisper-quiet operation
  • Enhanced G-Force Protection against handling damage
  • Clean Sweep calibration and Directed Offline scan diagnostics
  • RoHS (restriction of hazardous substances) compliant

The 7200.10 series disks have a good reputation for being a rock solid storage product. We are inclined to agree. The ST3320620AS is the first generation of hard disk to use perpendicular recording. Areal density is now so high that the sectors are now squeezed very tightly together.,

Originally this disk worked fine but after several years we noticed it needed to be reformatted occasionally. Evidently the disk had some issues with retentivity. WIndows does not have any sophisticated tools to scrub a disk for errors and repair them. This is why we install 4 disks in machines, to allow quick backups before copying to DVD or a network storage device.

We have always used several disks as system errors were all too common with Windows XP. The DVD burner is a low cost way to add fault tolerance to hard disks.

Many users of this disk with RAID controllers also reported this disk was successful. RAID5 is helpful against a single disk failure.

We have one of these disks and it has survived for more than a decade. It has accumulated more than 40,000 operating hours.

We use high-end power supplies which may have contributed to the survival of this hard disk. Clean power is important as disks do not have regulators etc to condition power.

Seagate disk capacity graph