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Silver 3.5 inch bare hard drive with circuit board visible

Seagate

Seagate ST3320820A BarraCuda 7200.10 320GB 7200 RPM 8MB IDE 3.5" internal hard drive

SKU CH-JAPJ-SFWWM MPN ST3320820A

320GB 7200 RPM IDE desktop hard drive with 8MB cache and perpendicular recording technology

  • Total capacity320 GB
  • Interface typeIDE Ultra ATA100 / ATA-6
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory8 MB
  • 320 GB capacity stores large media libraries
  • 7200 RPM spindle speed delivers responsive data access
  • 8 MB cache buffers frequent read and write operations
  • IDE Ultra ATA100 interface fits legacy desktop motherboards
  • Perpendicular recording technology increases areal density for reliable storage

Seagate BarraCuda 7200.10 320GB IDE drive

This new Seagate ST3320820A is a 3.5 inch desktop internal hard drive with a 320GB capacity. It spins at 7200 RPM and uses an 8MB cache on an IDE Ultra ATA100 interface. Perpendicular recording technology supports the stated capacity and reliability.

Suits legacy IDE builds only

This drive fits systems that still accept a 3.5 inch IDE Ultra ATA100 connection. Builders working with motherboards that lack an IDE header cannot use this unit. Users needing higher capacities or faster interfaces should consider other options.

Interface decides compatibility

The IDE Ultra ATA100 connector is the single specification that determines whether this drive will install in your system. Verify that your motherboard or controller provides a matching 40-pin IDE port before purchase.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $52.99
Cheaper than about 75% of the 4,938 comparable items (median $107.99).
Total capacity 320 GB
Lower than about 87% of the 2,372 comparable items (median 2 TB).
Price per TB $165.59 per TB
Pricier than about 74% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineBarraCuda 7200.1
Model nameST3320820A
Total capacity320 GB
Performance
Rotational speed7,200 RPM
Average seek time11 ms
Mean write time12 ms
Mean latency4.16 ms
Storage
Cache memory8 MB
Ports & slots
Interface typeIDE Ultra ATA100 / ATA-6
Size & build
Form factor3.5 in (8.89 cm)
Shipping weight0.68 kg
Package size203 × 152 × 51 mm

Questions about this item

Is the 320GB capacity the only option in the BarraCuda 7200.10 range?

This listing is for the 320GB model ST3320820A; other capacities exist in the series but are separate part numbers.

What does the 7200 RPM spindle speed mean for everyday use?

The 7200 RPM rotation gives an 11ms average seek time and 4.16ms latency, so the operating system and applications load faster than slower-spinning IDE drives.

Will the IDE Ultra ATA100 / ATA-6 interface limit transfer speed on a modern motherboard?

The ATA-6 interface caps the drive at 100 MB/s, so the 8MB cache and 7200 RPM platters cannot exceed that ceiling even on a faster controller.

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