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Silver 3.5 inch SAS hard drive with circuit board visible

Seagate

Seagate ST4000NM0125 4 TB 3.5" SAS 7200 RPM 128 MB internal hard drive

SKU CH-E9QJ-7MAWD

A 4 TB 3.5-inch SAS internal hard drive spinning at 7200 RPM with a 128 MB cache

  • InterfaceSAS 12Gb/s
  • Capacity4TB
  • NAND Flash Memory TypeSLC
  • RPM7200 RPM
  • Cache128MB
  • Form Factor3.5"
  • 4 TB capacity stores large datasets
  • 7200 RPM spindle delivers fast sequential throughput
  • 128 MB cache buffers heavy write workloads
  • SAS 12Gb/s interface supports dual-port redundancy
  • 5 inch form factor fits standard drive bays

Enterprise Capacity Drive

The Seagate ST4000NM0125 is a 4TB 3.5-inch internal hard drive built for servers and storage arrays that require the SAS 12Gb/s interface. It spins at 7200 RPM with a 128MB cache to sustain heavy read and write workloads. The SLC NAND flash component supports data integrity features in demanding environments. This drive suits administrators who need high-capacity, enterprise-grade storage on a 12Gb/s SAS fabric.

Not For Direct Desktop Use

Systems without a SAS host bus adapter or backplane cannot connect this drive, so standard PC builders should look elsewhere. Laptop upgrades and small-form-factor enclosures are unsuitable due to the 3.5-inch form factor. Buyers who need a different interface protocol or a smaller physical size must choose another product.

Interface Is SAS 12Gb/s

The single specification that determines compatibility is the SAS 12Gb/s interface, which requires a matching controller or backplane. Without that connection the drive will not function in the target system. Verify the host hardware supports this interface before purchase.

Points forts

  • 4 TB capacity stores large datasets
  • 7200 RPM spindle delivers fast sequential throughput
  • 128 MB cache buffers heavy write workloads
  • SAS 12Gb/s interface supports dual-port redundancy
  • 5 inch form factor fits standard drive bays

Caractéristiques

BrandSeagate
ModelST4000NM0125
InterfaceSAS 12Gb/s
Capacity4TB
NAND Flash Memory TypeSLC
RPM7200 RPM
Cache128MB
Form Factor3.5"

Questions sur cet article

How much heat and noise does the ST4000NM0125 produce during continuous 7200 RPM operation?

The 3.5-inch drive spins at 7200 RPM with a SAS 12Gb/s interface; sustained enterprise workloads generate typical mechanical-drive heat and audible seek noise.

What host connector and controller does the ST4000NM0125 require to function?

It needs a 12 Gb/s SAS backplane or HBA with a compatible SAS cable; the drive uses a standard SAS data and power connector.

Can the ST4000NM0125 share a SAS backplane with older 6 Gb/s SAS drives?

Yes, the 12 Gb/s SAS interface auto-negotiates down to 6 Gb/s, so the 4 TB drive operates alongside legacy SAS devices on the same domain.

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