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Silver 2.5 inch enterprise SAS hard drive with Dell label

DELL

DELL 400-ATJL 1.2TB 10000 RPM SAS 12Gb/s 2.5" internal hard drive

SKU CH-DERZ-TW294 MPN 400-ATJL

A 1.2 TB 2.5" enterprise SAS hard drive spinning at 10000 RPM with a 12 Gb/s interface for fast server storage

  • PackagingBare Drive
  • InterfaceSAS 12Gb/s
  • Capacity1.2TB
  • NAND Flash Memory TypeHard Drive
  • RPM10000 RPM
  • Average Latency12Gb/s
  • 2 TB capacity stores large data sets
  • 10 000 RPM spindle speed provides fast disk access
  • SAS 12 Gb/s interface delivers high data transfer rates
  • 5 inch hot-plug form factor fits enterprise server bays
  • 512 n sector format ensures broad compatibility

Capacity and interface

This Dell 400-ATJL drive delivers 1.2TB of storage on a SAS 12Gb/s interface. The 2.5 inch form factor fits hot-plug server bays. It is built for enterprise storage arrays that demand consistent throughput.

10000 RPM headroom

A 10000 RPM spindle speed provides fast disk access for transactional workloads and mixed read/write patterns. The 512n disk format aligns with legacy application expectations. Sustained performance drops when queues exceed the mechanical limits of the rotating media.

Hot-plug tray and Dell qualification

The bare drive ships without a caddy; the hot-pluggable design assumes a compatible Dell carrier is already present in the chassis. Firmware is validated for the listed PowerEdge and PowerVault models. Systems outside that qualification list may not recognise the drive or enable full SAS features.

Highlights

  • 2 TB capacity stores large data sets
  • 10 000 RPM spindle speed provides fast disk access
  • SAS 12 Gb/s interface delivers high data transfer rates
  • 5 inch hot-plug form factor fits enterprise server bays
  • 512 n sector format ensures broad compatibility

Specifications

BrandDell
Model400-ATJL
PackagingBare Drive
InterfaceSAS 12Gb/s
Capacity1.2TB
NAND Flash Memory TypeHard Drive
RPM10000 RPM
Average Latency12Gb/s
UsageFor Enterprise Storage
Form Factor2.5"
Shipping weight0.68 kg
Package size635 × 127 × 76 mm

Questions about this item

Will the 12Gb/s SAS interface work with my existing 6Gb/s SAS backplane?

Yes, the drive negotiates down to 6Gb/s on older backplanes while keeping full 1.2TB capacity and 10000 RPM performance.

How can I verify the drive is running at 10000 RPM and 12Gb/s after installation?

Check the controller BIOS or OS utility — it will report 10000 RPM spindle speed and a negotiated 12Gb/s SAS link rate.

Does the bare-drive package include a 2.5" hot-plug carrier or mounting screws?

No, the 400-ATJL ships as a bare drive only; the hot-plug carrier and any screws must be sourced separately for your server chassis.

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