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Silver rectangular 3.5 inch bare hard drive with circuit board visible on underside

Seagate

Seagate ST8000NM0065 8TB 3.5" 7200 RPM SAS 12Gb/s 256MB Cache 4Kn Internal Hard Drive

SKU CH-7MYE-JP5AT MPN ST8000NM0065

8TB 3.5-inch enterprise SAS drive at 7200 RPM with 256MB cache and 4Kn format for 24×7 bulk-data workloads

  • Total capacity8 TB
  • Interface typeSAS 12Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Cache memory256 MB

Capacity 8TB

  • 8TB capacity with industry-leading 6-disk design delivers 33% more storage per slot
  • 7200 RPM and 256MB cache provide low 4.16ms latency for fast data access
  • SAS 12Gb/s interface enables 12Gb/s transfer speeds for enterprise storage systems
  • Engineered for 24×7 operation with 550TB/yr workload rating — 10× desktop drives
  • Advanced Write Caching and rotational vibration tolerance ensure consistent performance in dense multi-drive arrays

Enterprise 8TB SAS Drive

The Seagate ST8000NM0065 is an 8TB 3.5-inch enterprise hard drive built for bulk-data workloads. It spins at 7200 RPM with a 256MB cache and uses a SAS 12Gb/s interface. The drive employs conventional magnetic recording across six disks to fit more capacity into a standard drive bay. It is engineered for continuous 24×7 operation with a 550TB per year workload rating.

Installation and Common Issues

The drive fits a standard 3.5-inch bay measuring 147mm long, 101.85mm wide and 26.10mm high. It connects via a SAS 12Gb/s backplane or controller; the interface also supports SATA 6Gb/s signalling for compatible systems. The 4Kn sector format requires an operating system and controller that support 4K native addressing. Firmware mismatches between the drive and the RAID controller are the most frequent cause of detection failures.

Who This Suits and Who Should Look Elsewhere

This drive suits storage arrays, backup targets and nearline archives that need high capacity with consistent multi-drive performance. It is not suited for boot drives or low-latency transactional workloads that demand solid-state response times. Buyers without SAS infrastructure or 4Kn-aware controllers should look at drives with 512e formatting or SATA-only interfaces. Systems limited to 512-byte sector addressing cannot use this model.

How it compares

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

Price $242.99
Pricier than about 76% of the 4,938 comparable items (median $107.99).
Total capacity 8 TB
Higher than about 80% of the 2,372 comparable items (median 2 TB).
Price per TB $30.37 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 lineEnterprise Capacity 3.5
Model nameST8000NM0065
Total capacity8 TB
Recommended useFor Enterprise Storage
Performance
Rotational speed7,200 RPM
Mean latency4.16 ms
Storage
Cache memory256 MB
Ports & slots
Interface typeSAS 12Gb/s
Size & build
Form factor3.5 in (8.89 cm)
Max height26.1 mm
Maximum width101.85 mm
Maximum length147 mm
Shipping weight1.03 kg
Package size152 × 102 × 25 mm

Other versions of this model

2 more in the same range

Questions about this item

How can I confirm the ST8000NM0065 is performing correctly after installation?

The drive should report 8TB capacity and a 7200 RPM spindle speed in your RAID controller or OS utilities. Expect an average latency near 4.16ms and sustained throughput up to the SAS 12Gb/s link rate. SMART attributes will show zero reallocated sectors on a healthy new unit.

What ships with the bare drive and what must I source separately?

The package contains only the 3.5-inch drive itself. You must supply a SAS 12Gb/s backplane or HBA, power and data cables, mounting screws or a drive tray, and a server or storage chassis with adequate cooling for 24×7 operation.

When should I choose the 4Kn 8TB model over other format options?

Select this 4Kn version when your controller, OS and filesystem all support 4K native sectors. It avoids 512e emulation overhead and matches the drive's physical 4K sector layout for optimal efficiency in bulk-data and RAID workloads.

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