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Silver 3.5 inch bare SATA hard drive with circuit board visible

Seagate

Seagate ST1000NM0055 1TB 3.5" 7200 RPM 128MB cache 512n SATA internal hard drive

SKU CH-03RK-15ESB MPN ST1000NM0055

A 1 TB 3.5-inch enterprise hard drive spinning at 7200 RPM with 128 MB cache and 512n SATA interface

  • PackagingBare Drive
  • Interface512n SATA
  • Capacity1TB
  • NAND Flash Memory TypeSLC
  • RPM7200 RPM
  • Cache128MB

Options 1TB

  • Enterprise-grade reliability with 7200 RPM spindle speed
  • 128 MB cache accelerates sustained throughput
  • 512n SATA interface ensures broad host compatibility
  • Conventional magnetic recording stores 1 TB on 3.5-inch form factor
  • 16 ms average latency supports low-latency workloads

Enterprise storage drive

The Seagate ST1000NM0055 is a 1TB 3.5-inch hard drive built for enterprise storage systems and bulk-data applications. It uses conventional magnetic recording technology and a 7200 RPM spindle speed to deliver consistent throughput in multi-drive environments. This new drive targets IT professionals who need reliable capacity for servers or NAS arrays.

512n SATA interface

The drive connects through a 512n SATA interface, which matches the native sector size expected by many legacy controllers and operating systems. A 128MB cache buffers write bursts and reduces average latency to 4.16ms during mixed workloads. Buyers whose hardware requires 4Kn or 512e emulation should verify controller compatibility before purchase.

Thermal and power profile

Physical dimensions are 26.10mm height, 101.85mm width and 147.00mm length, fitting standard 3.5-inch drive bays. The 7200 RPM motor produces typical enterprise acoustic levels and heat output under continuous operation. Power draw scales with workload intensity; system builders should confirm their chassis cooling and power budget accommodate sustained drive activity.

Highlights

  • Enterprise-grade reliability with 7200 RPM spindle speed
  • 128 MB cache accelerates sustained throughput
  • 512n SATA interface ensures broad host compatibility
  • Conventional magnetic recording stores 1 TB on 3.5-inch form factor
  • 16 ms average latency supports low-latency workloads

Specifications

BrandSeagate
ModelST1000NM0055
PackagingBare Drive
Interface512n SATA
Capacity1TB
NAND Flash Memory TypeSLC
RPM7200 RPM
Cache128MB
Average Latency4.16ms
FeaturesCapacity-Optimized Enterprise Hard Drive for Bulk-Data Applications
- 1TB to 8TB*, 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 integr
UsageFor Enterprise Storage
Form Factor3.5"
Height (maximum)26.10mm
Width (maximum)101.85mm
Length (maximum)147.00mm
Shipping weight0.62 kg
Package size164 × 133 × 36 mm

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Questions about this item

What does the 7200 RPM spindle speed mean for everyday workloads on this drive?

The 7200 RPM speed delivers an average latency of 4.16ms, giving quicker random access for operating system files and database workloads than slower-spinning drives.

How does the 512n SATA interface limit real-world throughput?

The SATA link caps sustained transfer at the interface maximum, so sequential reads and writes cannot exceed that bandwidth regardless of the 128MB cache.

Will the 3.5-inch form factor with 26.10mm height fit my standard drive bay?

Yes, the drive measures 147.00mm long, 101.85mm wide and 26.10mm high, matching the standard 3.5-inch bay dimensions used in most desktop chassis and server trays.

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