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Silver 3.5 inch internal hard drive with SAS connector and hot-swap tray handle

DELL

DELL 400-ALRT 4TB 7.2K SAS 12Gb/s 3.5" internal hard drive

SKU CH-D612-HQZ3A MPN 400-ALRT

A 4TB 7200 RPM SAS 12Gb/s 3.5" drive with 128MB cache for hot-swap PowerEdge servers

  • InterfaceSAS 12Gb/s
  • Capacity4TB
  • RPM7200 RPM
  • Form Factor3.5"
  • 4TB capacity stores large datasets and backups
  • 7200 RPM spindle speed delivers responsive read and write performance
  • SAS 12Gb/s interface provides high-throughput connectivity for servers
  • 128MB cache buffers bursts for smoother sustained transfers
  • Hot-swap support allows drive replacement without system downtime

4TB SAS 12Gb/s Enterprise Drive

This 4TB 3.5 inch drive uses a SAS 12Gb/s interface and spins at 7200 RPM with a 128MB cache. It is built for Dell PowerEdge servers such as the T330, T430, T630, R530, R630 and R730. The hot-swap capability allows drive replacement without shutting down the system. It suits administrators who need reliable bulk storage in supported 12Gb/s SAS backplanes.

Sustained Workload Behaviour

The 7200 RPM spindle speed delivers consistent throughput for sequential workloads such as backups, archives and media repositories. The 128MB cache helps smooth burst write activity before data reaches the platters. SAS signalling provides dual-port redundancy and better error recovery than single-port alternatives. Buyers who need low-latency random I/O for databases or virtualisation should consider faster spindle speeds or solid-state media instead.

Installation Notes

The 3.5 inch form factor fits standard SAS drive bays and caddies in the listed PowerEdge models. Hot-swap support means the drive can be inserted or removed while the server is running, provided the backplane and controller support it. Compatibility is limited to systems with 12Gb/s SAS controllers and the correct drive carrier; it will not work in SATA-only backplanes or laptops. Always verify the server's drive carrier requirements before ordering.

Highlights

  • 4TB capacity stores large datasets and backups
  • 7200 RPM spindle speed delivers responsive read and write performance
  • SAS 12Gb/s interface provides high-throughput connectivity for servers
  • 128MB cache buffers bursts for smoother sustained transfers
  • Hot-swap support allows drive replacement without system downtime

Specifications

InterfaceSAS 12Gb/s
Capacity4TB
RPM7200 RPM
Form Factor3.5"

Questions about this item

How much heat and power does the 7200 RPM SAS 12Gb/s drive add when running continuously in a server?

At 7200 RPM the drive draws typical SAS nearline power levels; the 128 MB cache helps smooth bursts, so sustained heat is comparable to other 3.5" 4 TB enterprise drives.

Which controller or backplane must my system already have to use the SAS 12Gb/s interface?

A SAS 12 Gb/s HBA, RAID card or backplane with 3.5" hot-swap bays is required; the drive will not work on a SATA-only connector.

Will this 4 TB SAS drive work in my older PowerEdge R630 or T430 that currently runs 2 TB SATA disks?

Yes — the R630 and T430 support 12 Gb/s SAS 3.5" hot-swap bays, so the drive fits mechanically and negotiates at the controller's maximum speed.

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