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Silver rectangular 2.5 inch bare laptop hard drive

Seagate

Seagate Momentus 5400.4 ST9250827AS 250GB 5400 RPM 8MB Cache SATA 3.0Gb/s 2.5" laptop hard drive

SKU CH-7RWY-4HE69 MPN ST9250827AS

A 2.5 inch laptop hard drive with 250GB capacity, 5400 RPM speed and 8MB cache over SATA 3.0Gb/s

  • Total capacity250 GB
  • Interface typeSATA 3.0Gb/s
  • Form factor2.5 in (6.35 cm)
  • Packaging typeBare Drive
  • Cache memory8 MB
  • Mean latency5.6 ms
  • 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.

How it compares

Measured against everything we stock in 2.5-Inch Internal Laptop HDDs, at today’s prices. Recalculated every night.

Price $45.99
Cheaper than about 73% of the 645 comparable items (median $66.99).
Total capacity 250 GB
Lower than about 64% of the 419 comparable items (median 320 GB).
Price per TB $183.96 per TB
Cheaper than about 58% of the 416 comparable items (median $233.48 per TB).

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Specifications

Product
Brand nameSeagate
Product lineMomentus 5400.4
Model nameST9250827AS
Total capacity250 GB
Performance
Mean latency5.6 ms
Rotational speed5,400 RPM
Storage
Cache memory8 MB
Ports & slots
Interface typeSATA 3.0Gb/s
Size & build
Form factor2.5 in (6.35 cm)
Shipping weight0.11 kg
Package size127 × 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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