HP 638521-002 G8 3TB SAS Hard Drive [5 Pack]

Name: HP 638521-002 G8 3TB SAS Hard Drive [5 Pack]
Brand: HP
SKU: SAS SD

Equip your HP G8/G9 servers with 15TB of reliable SAS storage in one five-pack of enterprise 3.5-inch drives.

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Overview

The HP 638521-002 is a five-pack of 3TB 3.5-inch SAS hard drives engineered for HP ProLiant G8 and G9 servers. Each drive operates at 7,200 RPM and connects via a 6Gb/s SAS interface, providing the throughput and reliability that enterprise storage environments demand. With five drives in the bundle, administrators get 15TB of raw capacity in a single purchase — ideal for expanding server storage for file shares, backups, media archives, or any workload where capacity takes priority over random I/O speed.

Built to HP's enterprise specifications, these drives are designed to run continuously in server and data center conditions, with SAS connectivity ensuring compatibility with HP's server backplanes and storage controllers. The 7.2K RPM speed class positions them squarely in the nearline storage tier — delivering consistent sequential throughput for large data sets while keeping power consumption and cost below that of 10K or 15K RPM alternatives. For organizations running G8 or G9 infrastructure and needing to scale storage affordably, this five-pack provides a straightforward, server-validated solution.

Specifications

Brand

Model

638521-002

Capacity (per drive)

3 TB

Interface

6Gb/s SAS

Spindle Speed

7,200 RPM

Form Factor

3.5 inch

Compatibility

HP G8 and G9 Servers

Quantity

5 drives

Pros & Cons

👍 Pros

Five-pack bundle provides 15TB of total storage, reducing per-drive procurement cost
6Gb/s SAS interface delivers reliable throughput for enterprise server environments
3.5-inch form factor with 3TB per drive maximizes capacity per drive bay
Designed specifically for HP G8 and G9 servers for straightforward compatibility

👎 Cons

7.2K RPM spindle speed is slower than 10K or 15K RPM drives for random I/O workloads
SAS interface is not compatible with standard desktop SATA controllers
Mechanical hard drives are significantly slower than SSD alternatives for latency-sensitive tasks
Large 3.5-inch form factor will not fit servers or enclosures limited to 2.5-inch bays

Frequently Asked Questions

What HP server generations are these drives compatible with?

These HP 638521-002 drives are designed for use with HP ProLiant G8 and G9 server platforms.

What is the total storage capacity of this five-pack?

Each drive is 3TB, so the five-pack provides 15TB of total raw storage capacity.

What interface do these drives use?

They use a 6Gb/s SAS (Serial Attached SCSI) interface, which is standard for enterprise server and storage environments.

Are these drives suitable for high-transaction database workloads?

At 7.2K RPM, these drives are optimized for capacity-oriented workloads such as bulk storage, backups, and file serving rather than high-IOPS transactional databases.

Do the drives include server trays or caddies?

The listing specifies the drives themselves. Check the seller's listing details to confirm whether compatible 3.5-inch drive trays are included.