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Silver 3.5 inch bare hard drive with exposed circuit board

Seagate

Seagate ST3320620A 320GB 7200 RPM 16MB Cache IDE Ultra ATA100 3.5" internal hard drive

SKU CH-QKTF-RQKFP MPN ST3320620A

320GB 3.5-inch IDE desktop drive with 7200 RPM, 16MB cache and perpendicular recording for capacity and reliability

  • PackagingBare Drive
  • InterfaceIDE Ultra ATA100 / ATA-6
  • Capacity320GB
  • NAND Flash Memory TypeHard Drive
  • RPM7200 RPM
  • Cache16MB
  • 7200 RPM spindle speed delivers responsive desktop performance
  • 16MB cache buffers frequent read and write operations
  • IDE Ultra ATA100 interface fits legacy motherboard connectors
  • 320GB capacity stores operating system plus everyday files
  • Perpendicular recording technology increases areal density for reliable storage

BarraCuda 7200.10 320 GB IDE drive

This 3.5 inch desktop hard drive uses the IDE Ultra ATA100 interface and spins at 7200 RPM with a 16 MB cache. It suits owners of legacy systems that still rely on parallel ATA connections for primary storage or backup.

Interface limits at ATA-6

The Ultra ATA100 / ATA-6 bus tops out at 100 MB per second, so sustained throughput cannot exceed that ceiling regardless of platter speed. Average seek is 11 ms, average write is 12 ms and average latency is 4.16 ms, figures that reflect the mechanical constraints of the era.

Bare drive build and daily implications

The bare drive arrives without cables, brackets or mounting screws, so installers must supply their own 40-pin IDE ribbon and a spare 3.5 inch bay. Perpendicular recording and G-Force protection were designed for reliability in older chassis, while RoHS compliance confirms restricted substance limits.

Highlights

  • 7200 RPM spindle speed delivers responsive desktop performance
  • 16MB cache buffers frequent read and write operations
  • IDE Ultra ATA100 interface fits legacy motherboard connectors
  • 320GB capacity stores operating system plus everyday files
  • Perpendicular recording technology increases areal density for reliable storage

Specifications

BrandSeagate
SeriesBarraCuda 7200.10
ModelST3320620A
PackagingBare Drive
InterfaceIDE Ultra ATA100 / ATA-6
Capacity320GB
NAND Flash Memory TypeHard Drive
RPM7200 RPM
Cache16MB
Average Seek Time11ms
Average Write Time12ms
Average Latency4.16ms
FeaturesImportant Warranty Information
This product is end-of-sale and no longer warranted by the manufacturer. Instead, warranties this product for one year from date of purchase. If you require warranty service after thirty days, please contact Customer Service, not the manufacturer.
Perpendicular recording technology for maximum drive capacity and reliability
Ultra-fast performance
Superb reliability
Whisper-quiet operation
Enhanced G-Force Protection against handling damage
Clean Sweep calibration and Directed Offline scan diagnostics
RoHS (restriction of hazardous substances) compliant
Form Factor3.5"
Shipping weight0.59 kg
Package size146 × 102 × 28 mm

Questions about this item

Which capacity of the Seagate ST3320620A should I pick for a desktop upgrade?

The drive is offered in a single 320GB capacity, so there is no choice to make — it fits any 3.5" bay that accepts an IDE Ultra ATA100 device.

What does the 7200 RPM spindle speed deliver once the drive is installed?

A 7200 RPM rotation rate combined with a 16MB cache yields an average seek time of 11ms and average latency of 4.16ms, giving responsive desktop performance on the IDE Ultra ATA100 bus.

What does the IDE Ultra ATA100 interface cap at in practice?

The ATA-6 Ultra ATA100 interface limits burst transfers to 100 MB/s, and real-world throughput will be lower due to the 7200 RPM mechanics and 11ms seek time.

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