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Silver 3.5 inch SAS hard drive with circuit board visible

DELL

DELL 400-ATKM 4TB 3.5" 7200 RPM SAS 12Gb/s internal hard drive

SKU CH-G2G7-M3MMH

A 4 TB 3.5-inch SAS hard drive spinning at 7200 RPM with a 12 Gb/s interface

  • Total capacity4 TB
  • Interface typeSAS 12Gb/s
  • Form factor3.5 in (8.89 cm)
  • Rotational speed7,200 RPM
  • 4TB capacity stores large datasets and backups
  • 7200 RPM spindle speed delivers consistent read and write performance
  • SAS 12Gb/s interface provides high-throughput connectivity for servers
  • 5-inch form factor fits standard enterprise drive bays
  • 512n sector format ensures compatibility with legacy and modern systems

Dell 4TB 3.5" SAS Hard Drive

This Dell 400-ATKM is a 4TB internal hard drive built for desktop and server bays. It uses a SAS 12Gb/s interface and spins at 7200 RPM in a standard 3.5-inch form factor. The drive is supplied new in either retail or OEM packaging.

Suited for SAS bays needing 4TB at 7200 RPM

This drive fits systems that accept 3.5-inch SAS devices and require 12Gb/s throughput with 512n sector formatting. It is not for builds that lack a SAS host adapter or backplane, nor for users who need a different capacity or a 2.5-inch form factor.

SAS 12Gb/s interface decides compatibility

The single specification that determines whether this is the correct part is the SAS 12Gb/s interface; the host must provide a matching SAS connection for the drive to function.

How it compares

Measured against everything we stock in 3.5-Inch Internal Desktop HDDs, at today’s prices. Recalculated every night.

Price $247.99
Pricier than about 76% of the 4,938 comparable items (median $107.99).
Total capacity 4 TB
Higher than about 70% of the 2,372 comparable items (median 2 TB).
Price per TB $62.00 per TB
Typical for this category: the median of 2,365 items is $62.21 per TB.

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Specifications

Product
Total capacity4 TB
Performance
Rotational speed7,200 RPM
Ports & slots
Interface typeSAS 12Gb/s
Size & build
Form factor3.5 in (8.89 cm)

Questions about this item

Does the Dell 400-ATKM 4TB SAS drive ship with a tray or caddy, or must I buy one separately?

The drive is sold as a kit that includes the carrier tray shown in the part number X7K8W, so no separate bracket is required for a compatible Dell bay.

The title lists both 7.2K RPM and 7200 RPM — which speed should I use when planning RAID rebuild times?

Both figures describe the same spindle speed of 7200 RPM; use that value for any RAID rebuild or throughput calculation.

What does the 12Gb/s SAS interface actually deliver in a server backplane that only supports 6Gb/s?

The drive will negotiate down to 6Gb/s on that backplane, limiting peak transfer to the slower link while retaining full 4TB capacity and 512n sector format.

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