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Dell 4TB 3.5 inch SAS hard drive with caddy

DELL

DELL ST4000NM0295 4TB 7200RPM 3.5" SAS HDD accessory

SKU CH-R29F-HJWCE MPN ST4000NM0295

A 4 TB enterprise hard drive spinning at 7200 RPM with a 12 Gbps SAS interface and 128 MB cache in a 3.5 inch form factor

  • 4 TB capacity stores large enterprise datasets
  • 7 200 RPM spindle delivers fast sequential throughput
  • 128 MB cache buffers intensive I/O workloads
  • 12 Gbps SAS interface enables high-speed host connectivity
  • 5-inch form factor fits standard server drive bays

Enterprise 4 TB SAS drive

The Dell ST4000NM0295 is a 3.5 inch SAS hard drive rated at 4 TB and 7 200 RPM with 128 MB cache. It is built for Dell Gen14 servers and ships with a caddy for direct bay insertion. This unit targets IT teams expanding storage arrays in compatible enterprise chassis. Home desktop builders should look elsewhere because the SAS interface requires a matching controller.

Thermals noise and power

Mechanical operation at 7 200 RPM produces typical enterprise drive acoustics and heat output under sustained workloads. The 12 Gbps SAS link draws power from the backplane rather than a separate connector. No independent cooling or noise figures are supplied so plan airflow according to the server manufacturer guidance.

Build integration needs

Installation requires a 3.5 inch hot-swap bay and a 12 Gbps SAS backplane or HBA that recognises the Dell firmware. The included caddy secures the drive without extra screws. The form factor frees 2.5 inch slots for other devices but demands a chassis designed for 3.5 inch SAS trays.

Highlights

  • 4 TB capacity stores large enterprise datasets
  • 7 200 RPM spindle delivers fast sequential throughput
  • 128 MB cache buffers intensive I/O workloads
  • 12 Gbps SAS interface enables high-speed host connectivity
  • 5-inch form factor fits standard server drive bays

Specifications

No published specifications for this item yet.

Questions about this item

How is the 3.5" SAS drive secured in a Dell Gen14 caddy?

Slide the drive into the caddy until the SAS connector seats, then fasten the four side screws so the carrier locks into the chassis rail.

What component of the ST4000NM0295 typically wears out first?

The 7200 RPM spindle motor and actuator bearings are the mechanical parts that degrade over time.

What limits sustained write performance on this 4TB SAS drive?

The 128 MB cache buffers bursts, but the 7200 RPM platters set the steady-state throughput ceiling.

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