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Silver 3.5 inch SAS hard drive bare unit with hot-swap tray

DELL

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

SKU CH-QD0N-FMQ0B

A 4 TB 3.5 inch SAS hard drive spinning at 7200 RPM with a 12 Gb/s transfer rate and hot-swap tray

  • Total capacity4 TB
  • Interface typeSAS 3Gb/s
  • Form factor3.5 in (8.89 cm)
  • Packaging typeBare Drive
  • Rotational speed7,200 RPM
  • Mean latency3Gb/s
  • 4 TB capacity stores large datasets
  • 7200 RPM spindle delivers fast sequential access
  • SAS 12 Gb/s interface enables high-throughput transfers
  • 5 inch form factor fits standard drive bays
  • Hot-swap tray allows replacement without downtime

Dell 400-ANFK 4TB Nearline SAS Drive

The Dell 400-ANFK is a 4TB 3.5-inch internal hard drive built for nearline workloads. It spins at 7200 RPM and connects through a SAS interface rated at 12Gb/s. The drive ships as a bare unit with a hot-swap tray for quick installation in compatible bays. Dell part number 400-ANFK identifies the original equipment specification.

Suited for arrays needing high-capacity SAS storage

This drive fits servers and storage arrays that accept 3.5-inch SAS devices and benefit from 4TB of nearline capacity. The 7.2K spindle speed supports sequential throughput for bulk data, backups and archiving. It is not the right choice for buyers who want the low latency of solid-state media, for systems that only provide SAS 3Gb/s ports, or for environments where a 2.5-inch form factor is required.

12Gb/s SAS interface decides compatibility

The single specification that determines fit is the 12Gb/s SAS interface. A backplane or controller limited to 3Gb/s will restrict the drive to that lower transfer rate. Verify that the host system supports 12Gb/s SAS and provides a 3.5-inch hot-swap bay before purchase.

How it compares

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

Price $253.99
Pricier than about 77% 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 $63.50 per TB
Typical for this category: the median of 2,365 items is $62.21 per TB.

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Specifications

Product
Brand nameDell
Model name400-ANFK
Total capacity4 TB
Performance
Rotational speed7,200 RPM
Mean latency3Gb/s
Ports & slots
Interface typeSAS 3Gb/s
Size & build
Form factor3.5 in (8.89 cm)

Questions about this item

How do I install the 400-ANFK 3.5" SAS drive in a hot-swap bay and what step is often missed?

Slide the drive into the bay until the SAS connector seats fully, then lock the carrier latch; the step most people miss is securing the latch, which leaves the drive loose and prevents the 12 Gb/s link from initialising.

What maintenance or replacement will the 7200 RPM 4TB SAS drive need later?

Plan to replace the drive once its rated workload or SMART thresholds indicate wear; no field-serviceable parts exist inside the sealed 3.5" helium enclosure.

What limit appears first on the 400-ANFK under sustained 12 Gb/s writes?

The 7.2 K RPM mechanical latency caps sustained throughput before the 12 Gb/s SAS interface saturates.

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