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Silver 3.5 inch internal hard drive bare circuit board visible

Seagate

Seagate ST6000DM003Product BarraCuda 6TB 3.5" 5400 RPM 256MB SATA internal hard drive

SKU CH-Q4GB-HJNPK MPN ST6000DM003Product

A 6TB desktop hard drive with a 256MB cache and 5400 RPM spindle speed for bulk storage

  • Total capacity6 TB
  • Interface typeSATA 6.0Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Flash memory typeSLC
  • Rotational speed5,400 RPM
  • 6 TB capacity stores large media libraries
  • 256 MB cache speeds up frequent file access
  • SATA 6.0 Gb/s interface fits standard desktop bays
  • 5 inch form factor matches common drive cages
  • 5400 RPM spindle balances quiet operation with throughput

Capacity and interface

The Seagate BarraCuda ST6000DM003 is a 6TB 3.5-inch internal hard drive with a SATA 6.0Gb/s interface. It is built for desktop PCs, servers and storage systems that need a large volume of affordable storage. The 256MB cache helps smooth everyday read and write operations.

Sustained workload behaviour

At 5400 RPM the spindle delivers steady throughput for sequential tasks such as media libraries, backups and archival storage. Average seek time is 15ms and average latency is 6.0ms, so random access is slower than on higher-speed drives. The SLC NAND cache layer assists burst writes but does not change the sustained transfer ceiling.

Installation checks

Verify that your chassis has a free 3.5-inch bay and that your power supply provides a SATA power connector. The drive measures 1 inch high, 4 inches wide and 5.8 inches deep, and weighs approximately 1.34 lb. A SATA data cable is required and is not included in the bare-drive packaging.

How it compares

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

Price $180.99
Pricier than about 66% of the 4,938 comparable items (median $107.99).
Total capacity 6 TB
Higher than about 75% of the 2,372 comparable items (median 2 TB).
Price per TB $30.17 per TB
Cheaper than about 82% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Product lineBarraCuda
Model nameST6000DM003
Total capacity6 TB
Performance
Rotational speed5,400 RPM
Average seek time15 ms
Mean latency6.0 ms
Storage
Flash memory typeSLC
Cache memory256 MB
Ports & slots
Interface typeSATA 6.0Gb/s
Size & build
Form factor3.5 in (8.89 cm)

Questions about this item

How much power and heat does the 5400 RPM ST6000DM003 produce when running continuously?

The 5400 RPM spindle speed keeps power draw and heat lower than faster drives, making it suitable for all-day operation in a desktop or storage system.

What motherboard connector and physical bay does the 3.5" SATA/600 drive need?

It requires a standard SATA data port and a 3.5-inch drive bay; the bare drive ships without cables or mounting screws.

Will the 6 TB BarraCuda work alongside an older 3 Gb/s SATA controller?

Yes, the SATA 6.0Gb/s interface is backward compatible with earlier SATA revisions, so it will run at the controller's maximum speed.

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