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Silver 3.5 inch bare hard drive with circuit board visible

Seagate

Seagate ST6000NM0195 6TB 7200 RPM 512e SAS 256MB internal hard drive

SKU CH-WV6X-C8HBG MPN ST6000NM0195

6 TB 3.5-inch enterprise drive with 7200 RPM, 256 MB cache and 12 Gb/s SAS interface for 24×7 bulk-data workloads

  • Total capacity6 TB
  • Interface type512e SAS
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory256 MB
  • 6TB capacity supports bulk-data storage needs
  • 7200 RPM spindle speed delivers fast data access
  • 256MB cache buffer improves read and write performance
  • 12Gb/s SAS interface enables high-throughput enterprise connectivity
  • Engineered for 550TB per year 24x7 workloads

Enterprise 6 TB SAS drive

The Seagate ST6000NM0195 is a new 3.5-inch enterprise hard drive with a 6 TB capacity, 7200 RPM spindle speed and a 12 Gb/s SAS interface using 512e formatting. It includes a 256 MB cache and conventional magnetic recording technology designed for continuous operation in bulk-data applications. The bare drive measures 147 mm long, 101.85 mm wide and 26.10 mm high.

Suits RAID arrays and replicated servers.

This drive fits replicated and RAID multi-drive storage servers that accept a 12 Gb/s SAS connection and 512e sector format. It is built for 24x7 workloads up to 550 TB per year and handles rotational vibration in dense chassis. Systems without a SAS controller or backplane, or those requiring a SATA-only drive, cannot use this model.

12 Gb/s SAS interface with 512e format

The single specification that decides compatibility is the 12 Gb/s SAS interface combined with 512e sector formatting. Your host bus adapter, RAID controller or server backplane must support this exact interface and sector size. Average latency is 4.16 ms and the drive delivers up to 100 percent random-write improvement over the prior generation through advanced write caching algorithms.

How it compares

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

Price $267.99
Pricier than about 79% 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 $44.67 per TB
Cheaper than about 66% of the 2,365 comparable items (median $62.21 per TB).

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Specifications

Product
Brand nameSeagate
Model nameST6000NM0195
Total capacity6 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Cache memory256 MB
Ports & slots
Interface type512e SAS
Size & build
Form factor3.5 in (8.89 cm)
Max height26.1 mm
Maximum width101.85 mm
Maximum length147 mm
Shipping weight0.91 kg
Package size178 × 152 × 76 mm

Questions about this item

What does the 12Gb/s SAS interface cap in practice?

The 12Gb/s SAS link caps sustained throughput at the controller's maximum lane speed, so sequential reads and writes cannot exceed that bus limit even though the drive spins at 7200 RPM with a 256MB cache.

What physical clearance does the 3.5-inch form factor need to fit or mount?

The drive measures 147.00mm long, 101.85mm wide and 26.10mm high, so the bay or caddy must provide at least those dimensions plus standard side-mount screw clearance.

How is the 512e SAS drive installed, and what step do people get wrong?

Connect the SAS data and power cables, then set the controller to 512e emulation mode; the common mistake is leaving the controller in 512n or 4Kn mode, which prevents the drive from being recognised.

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