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Silver 3.5-inch bare drive with exposed circuit board and SAS connector

Seagate

Seagate ST6000NM0205 6TB 7200 RPM 4Kn SAS 256MB internal hard drive

SKU CH-A6GC-7X7JK MPN ST6000NM0205

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

  • PackagingBare Drive
  • Interface4Kn SAS
  • Capacity6TB
  • RPM7200 RPM
  • Cache256MB
  • Average Latency4.16ms
  • 6TB capacity stores vast enterprise datasets
  • 7200 RPM spindle delivers responsive bulk-data throughput
  • 256MB cache accelerates random write performance
  • 12Gb/s SAS interface integrates into RAID arrays
  • Engineered for 24×7 workloads of 550TB/yr

Enterprise Capacity for Bulk Data

The Seagate ST6000NM0205 is a 6TB 3.5-inch internal hard drive built for enterprise storage servers and arrays. It uses conventional magnetic recording (CMR) technology to deliver consistent performance in replicated and RAID multi-drive systems. The drive is engineered for continuous 24x7 operation with a workload rating of 550TB per year. It targets administrators who need high-capacity, reliable storage for unstructured bulk data applications.

12Gb/s SAS Interface Limits

The drive connects via a 12Gb/s SAS interface in 4Kn format, also supporting SATA 6Gb/s and 512n or 512e sector sizes. This interface caps the maximum sustained transfer rate at the bus speed, so sequential throughput cannot exceed the 12Gb/s link bandwidth. Random write performance benefits from Advanced Write Caching algorithms, but the SAS bus remains the hard ceiling for all I/O. Systems without a 12Gb/s SAS host adapter or backplane will not realise the full interface potential.

6TB Cache and Workload Headroom

A 256MB cache buffers bursts and improves random write efficiency up to 100% over the previous generation. The 6TB capacity suits bulk archives, backup targets and nearline storage tiers where capacity per slot is the priority. The 550TB annual workload rating defines the comfortable operating envelope; sustained write loads beyond this level risk reduced reliability. The drive is not suited for primary high-IOPS transactional databases or low-latency boot volumes.

Points forts

  • 6TB capacity stores vast enterprise datasets
  • 7200 RPM spindle delivers responsive bulk-data throughput
  • 256MB cache accelerates random write performance
  • 12Gb/s SAS interface integrates into RAID arrays
  • Engineered for 24×7 workloads of 550TB/yr

Caractéristiques

BrandSeagate
ModelST6000NM0205
PackagingBare Drive
Interface4Kn SAS
Capacity6TB
RPM7200 RPM
Cache256MB
Average Latency4.16ms
FeaturesCapacity-Optimized Enterprise Hard Drive for Bulk-Data Applications
- 1TB to 8TB*1, 3.5-inch enterprise drive with industry-leading conventional magnetic recording (CMR) technology
- Advanced Write Caching feature enables up to 100% performance improvement in random writes over last-generation drive
- 12Gb/s SAS and SATA 6Gb/s interfaces in industry-standard formats (512n, 512e and 4Kn) for easy integration into replicated and RAID multi-drive storage servers and systems
- State-of-the-art cache, on-the-fly error-correction algorithms, super parity and end-to-end SAS-based data integ
UsageFor Enterprise Storage
Form Factor3.5"
Height (maximum)26.10mm
Width (maximum)101.85mm
Length (maximum)147.00mm
Poids d’expédition1.06 kg
Dimensions du colis413 × 305 × 108 mm

Questions sur cet article

How do I choose between the 512n, 512e and 4Kn versions of this 6TB drive?

This model is the 4Kn version, meaning it uses 4K native sectors and requires a host controller and operating system that support 4Kn addressing; choose 512n or 512e only if your system cannot handle 4Kn.

What does the 7200 RPM speed mean for real-world throughput on a 12Gb/s SAS link?

The 7200 RPM spindle delivers sustained sequential transfers that typically saturate a single 12Gb/s SAS lane, while the 256MB cache and Advanced Write Caching absorb bursty random writes.

Does the 12Gb/s SAS interface also run at SATA 6Gb/s, and what limits the speed in practice?

The drive supports both 12Gb/s SAS and SATA 6Gb/s; the active speed is negotiated with the host controller, so a SATA backplane caps the link at 6Gb/s while a SAS expander allows the full 12Gb/s rate.

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