Seagate
Seagate Momentus 5400.4 ST9250827AS 250GB 5400 RPM 8MB Cache SATA 3.0Gb/s 2.5" laptop hard drive
A 2.5 inch laptop hard drive with 250GB capacity, 5400 RPM speed and 8MB cache over SATA 3.0Gb/s
- PackagingBare Drive
- InterfaceSATA 3.0Gb/s
- Capacity250GB
- Cache8MB
- Average Latency5.6ms
- RPM5400 RPM
- 250 GB capacity stores documents and media
- 5400 RPM spindle speed balances performance and power draw
- 8 MB cache smooths frequent read and write operations
- SATA 3.0 Gb/s interface connects directly to laptop motherboards
- 5 inch form factor fits standard notebook drive bays
Drive purpose and audience
The Seagate Momentus 5400.4 ST9250827AS is a 2.5 inch laptop internal hard drive with a 250GB capacity. It connects through a SATA 3.0Gb/s interface and spins at 5400 RPM with an 8MB cache. The drive is supplied new as a bare unit without cables or brackets.
Who this suits and who should look elsewhere
This drive suits owners of older notebooks or external enclosures that require a 2.5 inch SATA replacement with modest capacity. Buyers who need higher throughput for video editing, gaming or large database work should consider faster mechanical drives or solid-state alternatives. Systems that only accept 7mm or thinner modules may not accommodate this drive.
Deciding specification
The SATA 3.0Gb/s interface is the single specification that determines whether this drive will function in a given laptop or enclosure. Verify that the host device provides a standard SATA data and power connector for 2.5 inch drives before purchase.
Highlights
- 250 GB capacity stores documents and media
- 5400 RPM spindle speed balances performance and power draw
- 8 MB cache smooths frequent read and write operations
- SATA 3.0 Gb/s interface connects directly to laptop motherboards
- 5 inch form factor fits standard notebook drive bays
Specifications
| Brand | Seagate |
|---|---|
| Series | Momentus 5400.4 |
| Model | ST9250827AS |
| Packaging | Bare Drive |
| Interface | SATA 3.0Gb/s |
| Capacity | 250GB |
| Cache | 8MB |
| Average Latency | 5.6ms |
| RPM | 5400 RPM |
| Form Factor | 2.5" |
| Shipping weight | 0.11 kg |
| Package size | 127 × 89 × 13 mm |
Questions about this item
Will this 2.5" drive fit a standard laptop bay?
The drive uses the 2.5" form factor, matching the standard laptop hard-drive bay dimensions.
What is the correct way to connect the SATA 3.0Gb/s interface during installation?
Align the L-shaped SATA data and power connectors, press straight in until seated, and secure the drive with the laptop's mounting screws.
When should the 8MB cache drive be replaced in a typical laptop workload?
Plan replacement after 3–5 years or if SMART attributes show reallocated sectors, rising seek errors, or audible bearing noise.
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