Technical Snapshot

The Seagate BarraCuda 3.5 6TB SATA is a desktop 3.5" hard disk drive for desktop PCs and external storage. Spinning at 5,400 RPM with a 256 MB cache buffer, it delivers sustained transfer rates up to 190 MB/s over a SATA 6Gb/s interface. The drive is rated for 55 TB/year workload with a 1,000,000 hours MTBF, backed by Seagate's storage reliability engineering. With 6TB of raw storage capacity, it provides reliable storage for everyday desktop computing. Part of the Seagate BarraCuda 3.5 product line.

Use Case: Desktop storage, gaming, general computing
Compatibility: Standard 3.5" drive bay, SATA 6Gb/s interface
Category: Desktop Hard Disk Drive — Seagate BarraCuda 3.5

Seagate HDD

Seagate BarraCuda 3.5

BarraCuda 3.5 6TB SATA

Name: Seagate BarraCuda 3.5 6TB SATA
Brand: Seagate
SKU: ST6000DM003

SATA 6Gb/s · 3.5" · 5,400 RPM · 256 MB · 6TB

Capacity 6TB

RPM 5,400

Cache 256 MB

Workload 55 TB/year

MPNST6000DM003

EAN8719706004626

CategoryHard Disk Drives

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Drive Specifications

Form Factor3.5"

InterfaceSATA 6Gb/s

RPM5,400 RPM

Cache256 MB

Sustained Transfer Rate190 MB/s

Workload Rating55 TB/year

MTBF1,000,000 hours

Power (Idle)2.8W

Power (Operating)4.2W

Full Specifications

Data sourced from Seagate product specifications

Drive
Series	BarraCuda 3.5
Capacity	6TB
Form Factor	3.5"
Interface	SATA 6Gb/s
RPM	5,400 RPM
Cache	256 MB
Performance
Sustained Transfer Rate	190 MB/s
Workload Rating	55 TB/year
Reliability
MTBF	1,000,000 hours
Power (Idle)	2.8W
Power (Operating)	4.2W
Product
Brand	Seagate
Segment	Desktop
MPN	ST6000DM003
EAN	8719706004626
Physical
Weight	0.68 kg
Package Dimensions	50.8 x 30.48 x 22.86 cm

Support & Downloads

Seagate BarraCuda 3.5 6TB SATA Firmware UpdateLatest firmware · Check Seagate support

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Seagate BarraCuda 3.5 6TB SATA DatasheetPDF · Technical specifications

Seagate Support →

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Frequently Asked Questions

Is the BarraCuda 3.5 6TB SATA compatible with my NAS?

Yes, the Seagate BarraCuda 3.5 6TB SATA uses a standard SATA 6Gb/s interface and 3.5" form factor, compatible with any NAS that accepts 3.5" SATA drives. It is widely supported by Synology, QNAP, TrueNAS, and Unraid systems. The 55 TB/year workload rating makes it suitable for always-on NAS environments.

Can I use the BarraCuda 3.5 6TB SATA in a RAID array?

The Seagate BarraCuda 3.5 6TB SATA is a desktop drive. While it can physically work in a RAID array, desktop drives lack the error recovery tuning (TLER/ERC) that RAID controllers expect. For RAID deployments, consider enterprise or NAS-rated drives for better reliability.

What does the 55 TB/year workload rating mean?

The workload rating indicates the maximum annual data transfer the drive supports while maintaining stated reliability. 55 TB/year means the drive supports approximately 0.2 TB of data transfer per day, suitable for regular daily use.

How fast is the BarraCuda 3.5 6TB SATA?

The Seagate BarraCuda 3.5 6TB SATA spins at 5,400 RPM with a 256 MB cache buffer, delivering sustained transfer rates up to 190 MB/s. This provides solid performance for everyday desktop use.

How much power does the BarraCuda 3.5 6TB SATA consume?

The Seagate BarraCuda 3.5 6TB SATA draws 4.2W under operating load and 2.8W at idle.

JSON-LD Structured Data — Product + FAQ + Breadcrumb

Product: Seagate BarraCuda 3.5 6TB SATA
MPN: ST6000DM003
Schemas: Product + BreadcrumbList + FAQPage
Properties: 11 additionalProperty entries
Related: 5 isRelatedTo links