Seagate ST2400MM0159 2.4TB 10K SAS HDD

Name: Seagate ST2400MM0159 2.4TB 10K SAS HDD
Brand: Seagate
SKU: ST2400MM0159

Overview

The Seagate ST2400MM0159 is a 2.4TB enterprise hard drive spinning at 10,000 RPM with a 12Gb/s SAS-3 interface housed in a 2.5" small form factor chassis. Those three numbers — 2.4TB, 10K RPM, 12Gb/s — define its position precisely: this is a high-density, latency-optimized spinning drive for servers where SSD economics don't yet pencil out but NL-SAS 7.2K drives are too slow. The 10K spindle yields an average rotational latency of approximately 3ms versus 4.17ms for a 7.2K nearline drive, a 28% improvement that compounds across thousands of IOPS in a busy OLTP workload. The 12Gb/s SAS bus means the interface operates at 2× the bandwidth of SAS-2, ensuring the controller side never throttles the drive.

In practice this drive belongs in PowerEdge servers, HPE ProLiant G9/G10 systems, or any 2.5" SAS-3 backplane array where the workload profile is transactional — ERP databases, virtual machine storage pools, mail server data volumes, or any application characterized by random 4K–64K block I/O rather than large sequential streaming. It is not the right tool for pure bulk storage (where NL-SAS at 8TB+ per drive wins on density and cost) or for maximum IOPS (where SAS SSDs win decisively). It occupies the middle tier: high capacity relative to SAS SSDs, high performance relative to NL-SAS HDDs. System integrators refreshing aging 2.5" SAS-2 arrays will find it a cost-effective capacity upgrade with forward-compatible bandwidth headroom.

Key Features

Manufacturer: Seagate

Storage Capacity: 2.4 TB

Interface: 12 Gb/s SAS

Model: ST2400MM0159

Dell P/N: RWR8F

Specifications

Brand

Seagate

Model

ST2400MM0159

Storage Capacity

2.4 TB

Interface

12 Gb/s SAS (SAS-3)

Spindle Speed

10,000 RPM

Form Factor

2.5"

Dell Part Number

RWR8F

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Pros & Cons

👍 Pros

2.4TB capacity in a compact 2.5" form factor maximizes density in SFF server bays
12Gb/s SAS interface eliminates the interface as a throughput bottleneck at this spindle speed
10K RPM platter speed delivers lower rotational latency than nearline 7.2K SAS alternatives
Non-volatile SAS command queuing (NCQ) supports up to 254 queued commands, improving concurrent I/O performance
Dell qualification (P/N RWR8F) indicates the drive has passed enterprise-grade validation testing

👎 Cons

Spinning platter technology means significantly higher random IOPS ceiling compared to SAS SSDs of the same form factor
10K RPM continuous operation generates measurable heat in dense configurations — adequate airflow is non-negotiable
Power consumption is higher than NL-SAS drives when the workload keeps the spindle active at rated speed
No self-encrypting drive (SED) capability confirmed in published specifications, limiting use in data-at-rest compliance scenarios
As a pulled/refurbished enterprise unit, remaining drive life is unknown — SMART data review is essential before deployment

Frequently Asked Questions

What interface does this drive use and what does that mean for throughput?

It uses a 12Gb/s SAS interface, which provides up to 1,200 MB/s theoretical bandwidth — roughly double what a 6Gb/s SATA port can deliver. In practice this means the bus never becomes the bottleneck for a single spindle drive at 10K RPM.

Is the ST2400MM0159 compatible with standard SFF-8087 or SFF-8643 SAS backplanes?

Yes. The 2.5" SFF-8482 SAS connector is backward-compatible with SAS-2 (6Gb/s) controllers, but you will need a SAS-3 (12Gb/s) HBA or expander to achieve full rated bandwidth.

What RAID configurations is this drive suited for?

The ST2400MM0159 is well-suited for RAID 10 arrays where random I/O latency matters more than raw sequential throughput. Its 10K RPM platter speed keeps seek times low, making it practical for RAID 5/6 as well in mixed-workload environments.

Does the Dell P/N RWR8F designation affect compatibility with non-Dell servers?

The Dell P/N (RWR8F) indicates this unit was qualified and may have been pulled from Dell PowerEdge hardware. The drive itself follows standard SAS-3 specifications and will operate in any server with a compatible 12Gb/s SAS backplane — the Dell branding does not lock it to Dell hardware.

How does 2.4TB at 10K RPM compare to a 7.2K NL-SAS drive of similar capacity?

The 10K RPM spindle reduces average rotational latency from ~4.17ms (7.2K) to roughly 3ms, and seek times improve proportionally. For transactional database workloads with random read/write patterns this translates to meaningfully lower queue depths and better IOPS-per-watt than a comparable nearline drive.