Dell 400-AJSB 600GB SAS 12Gbps 15K 2.5 in - Enterprise Drive

In this review the Dell 400-AJSB is evaluated as a replacement or upgrade drive for servers that need consistent, high-performance storage. The bottom line: it is best for IT teams and system administrators who require a compact 2.5 in SAS drive with strong sustained I/O and a 15K RPM spindle for latency-sensitive workloads. The reviewer found the drive's 12Gbps SAS interface and 600GB capacity make it a straightforward fit in PowerEdge systems where higher spindle speed matters more than maximum capacity, especially for database, virtualization, or tier-1 application use.

Key Features

• 600GB Capacity: Provides a balance of usable space and performance for mixed database and virtual machine workloads without occupying a full 3.5 in bay.
• 15K RPM Performance: The high spindle speed delivers lower latency and better random IOPS compared with lower-RPM mechanical drives, which helps transactional applications.
• 12Gbps SAS Interface: The SAS 12Gbps link maintains sustained throughput and reliability in multi-drive server environments under heavy concurrency.
• 2.5 in Form Factor: The compact 2.5 in package fits modern server trays and increases drive density in compatible PowerEdge systems.
• Server Compatibility: Explicit compatibility with a wide range of PowerEdge models reduces deployment friction in homogeneous Dell server fleets.

Who It's For

The Dell 400-AJSB is aimed at enterprise and SMB IT admins running Dell PowerEdge servers who need a dependable 15K SAS drive for latency-sensitive tasks like OLTP databases, virtualization hosts with heavy random I/O, or caching tiers. Its 2.5 in size makes it especially useful where drive density and thermal management are factors.

Those who need large archival capacity, the ultimate sequential throughput of modern NVMe SSDs, or the lowest power draw should look elsewhere; this drive is tailored for performance per spindle rather than maximum terabytes or minimal energy usage.

Pros & Cons

Pros

• High 15K RPM gives strong random I/O responsiveness for transactional workloads.
• 12Gbps SAS interface provides robust sustained throughput in server arrays.
• 600GB size and 2.5 in package maximize usable performance in dense server configurations.

Cons

• As a 15K mechanical SAS drive, it cannot match NVMe SSDs for absolute IOPS or power efficiency.

Specifications

Brand	Dell Technologies
Model	400-AJSB
Capacity	600GB
Interface	SAS 12Gbps
Spindle Speed	15K RPM
Form Factor	2.5 in
Compatible Systems	PowerEdge R630, R730, T630, R730XD, R430, T430, R330, R830, T640, T440

Our Verdict

The Dell 400-AJSB is a practical choice for organizations running Dell PowerEdge servers that need a reliable 15K SAS 2.5 in drive for latency-sensitive applications. It delivers predictable performance, broad compatibility with common PowerEdge models, and good drive density; teams seeking cost-effective, high-spindle-speed storage will find it good value compared with older 3.5 in enterprise spindles or slower drives.

Frequently Asked Questions

Will this drive fit my PowerEdge server?
It is explicitly compatible with many PowerEdge models listed in the product details, so verify your model against that list before ordering.

Is this a hot-swap drive?
The drive uses a standard 2.5 in server package intended for hot-swap bays in compatible PowerEdge chassis when used with the appropriate carrier.

Should I use this instead of an SSD?
If your workload demands the highest IOPS and lowest latency, NVMe or SAS SSDs are preferable; this 15K SAS drive is a good compromise when spindle-based performance and lower cost per GB are priorities.