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Silver rectangular 2.5 inch bare laptop hard drive with circuit board visible

Seagate

Seagate Momentus 5400.6 ST9500325ASG 500GB 5400 RPM 8MB Cache SATA 3.0Gb/s 2.5" laptop hard drive

SKU CH-1NK2-KG4PE MPN ST9500325ASG

500 GB capacity at 5400 RPM with 8 MB cache and G-Force Protection for drop resistance

  • Total capacity500 GB
  • Interface typeSATA 3.0Gb/s
  • Form factor2.5 in (6.35 cm)
  • Packaging typeBare Drive
  • Cache memory8 MB
  • Mean latency5.6 ms
  • 500 GB capacity stores large media libraries and backups
  • 5400 RPM spindle speed delivers steady performance for everyday laptop tasks
  • 8 MB cache and SATA 3.0 Gb/s interface keep data flowing smoothly
  • G-Force Protection and 1000 Gs non-operating shock rating guard data against drops
  • 5 mm height fits standard 2.5 inch laptop drive bays

500 GB SATA laptop drive

The Seagate Momentus 5400.6 ST9500325ASG is a 2.5 inch internal hard drive with a 500 GB capacity. It spins at 5400 RPM and connects through a SATA 3.0Gb/s interface with an 8 MB cache. The bare drive measures 9.5 mm in height for standard laptop bays.

Quiet upgrade for older notebooks

This drive suits users replacing a failed drive or adding storage to a compatible laptop that accepts a 2.5 inch SATA device. G-Force Protection and a 1000 Gs non-operating shock rating help protect data from drops. Buyers needing higher throughput or lower access latency should consider alternative storage types.

5400 RPM spindle speed

The 5400 RPM rotation rate determines the drive's baseline latency and sustained transfer performance. Average latency is specified at 5.6 ms. This single figure defines whether the drive meets the performance requirements of the intended system.

How it compares

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

Price $103.99
Pricier than about 67% of the 645 comparable items (median $66.99).
Total capacity 500 GB
Higher than about 60% of the 419 comparable items (median 320 GB).
Price per TB $207.98 per TB
Cheaper than about 54% of the 416 comparable items (median $233.48 per TB).

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Specifications

Product
Brand nameSeagate
Product lineMomentus 5400.6
Model nameST9500325ASG
Total capacity500 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 weight0.10 kg
Package size102 × 70 × 8 mm

Questions about this item

Does the 5400 RPM ST9500325ASG need any scheduled maintenance or bearing replacement?

No scheduled maintenance is required for the 5400 RPM mechanism; the drive is sealed and the fluid-dynamic bearings are rated for the life of the unit.

What limit appears first when the Momentus 5400.6 runs sustained writes at 3.0 Gb/s?

The 5400 RPM spindle and 8 MB cache set the sustained throughput ceiling well below the 3.0 Gb/s SATA link speed.

How much heat and noise does the 9.5 mm ST9500325ASG produce in an all-day laptop workload?

QuietStep technology keeps acoustic output low and the 5400 RPM speed limits heat, so the drive stays cool and quiet during continuous use.

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