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Silver 3.5 inch SAS hard drive with exposed circuit board

Seagate

Seagate EXOS ST4000NM0125 4TB 7.2K 12Gb/s SAS 3.5" 128MB internal hard drive

SKU CH-7426-41YGB MPN ST4000NM0125

4 TB 3.5-inch SAS hard drive with 12 Gb/s interface, 7.2 K RPM and 128 MB cache for server storage

  • Capacity4TB
  • 4TB capacity stores large enterprise datasets
  • 12Gb/s SAS interface moves data quickly
  • 2K RPM spindle speed delivers consistent throughput
  • 128MB cache accelerates frequent read operations
  • 5-inch form factor fits standard server bays

Seagate EXOS 4TB SAS enterprise drive

This Seagate EXOS ST4000NM0125 is a 4TB internal hard drive built for server and storage-array workloads. It spins at 7.2K RPM and connects through a 12Gb/s SAS interface with a 128 MB cache. The 3.5 inch form factor fits standard enterprise drive bays and the drive is supplied new.

Suited for multi-drive arrays.

The SAS interface and server-class firmware target RAID, JBOD and backup appliances that can address dual-port SAS signalling. Systems without a SAS host bus adapter, RAID controller or expander cannot use this drive. Buyers who need a simple plug-and-play desktop storage drive should look elsewhere.

12Gb/s SAS interface dictates host compatibility

The single specification that decides fitment is the 12Gb/s SAS interface; the host must provide a native SAS connection or compatible controller. Without that interface the drive will not be recognised or able to transfer data.

Highlights

  • 4TB capacity stores large enterprise datasets
  • 12Gb/s SAS interface moves data quickly
  • 2K RPM spindle speed delivers consistent throughput
  • 128MB cache accelerates frequent read operations
  • 5-inch form factor fits standard server bays

Specifications

BrandSeagate
SeriesEXOS
ModelST4000NM0125
Part NumberST4000NM0125
Capacity4TB

Questions about this item

Which capacity should I choose for a server build?

This model provides 4TB of storage in a single 3.5-inch drive, suited for enterprise arrays.

What does the 7.2K speed mean for actual throughput?

The 7.2K spindle delivers consistent sequential performance for bulk storage workloads.

How does the 12Gb/s SAS interface limit real-world transfer rates?

The 12Gb/s SAS link caps the maximum interface bandwidth at 12Gb/s.

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