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

Seagate

Seagate ST9500424AS 500GB 7200 RPM 16MB Cache SATA 2.5" laptop hard drive

SKU CH-0KQT-D89CQ MPN ST9500424AS

A 500 GB 2.5" laptop hard drive spinning at 7200 RPM with 16 MB cache and a SATA 3.0Gb/s interface

  • Total capacity500 GB
  • Interface typeSATA 3.0Gb/s
  • Form factor2.5 in (6.35 cm)
  • Rotational speed7,200 RPM
  • Cache memory16 MB
  • Average seek time11 ms
  • 7200 RPM speeds up data access on laptops
  • 16 MB cache reduces wait times for frequent files
  • SATA 3.0 Gb/s interface fits standard notebook bays
  • 5 inch 9.5 mm form factor matches most laptop drive cages
  • 500 GB capacity stores large media libraries

Drive profile

The Seagate Momentus ST9500424AS is a 2.5 inch laptop internal hard drive built for 7200 RPM operation. It targets users who need a direct replacement drive for older notebooks or external enclosures that accept a 9.5mm SATA device.

Capacity and headroom

The drive provides 500GB of storage with a 16MB cache and an average seek time of 11ms. Average latency sits at 4.17ms. Units may show up to 25 bad sectors and are erased to DoD 5220.22 M compliance, so they arrive unformatted and unpartitioned.

SATA 3.0Gb/s limit

The SATA 3.0Gb/s interface caps sustained transfer rates below what modern SSDs deliver. The mechanical design and 7200.5 series platform mean the drive cannot match solid-state responsiveness or endurance for heavy write workloads.

How it compares

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

Price $104.99
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 $209.98 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
Model nameST9500424AS
Total capacity500 GB
Performance
Rotational speed7,200 RPM
Average seek time11 ms
Mean latency4.17 ms
Storage
Cache memory16 MB
Ports & slots
Interface typeSATA 3.0Gb/s
Size & build
Form factor2.5 in (6.35 cm)
Max height9.5 mm
Shipping weight0.91 kg
Package size140 × 89 × 51 mm

Questions about this item

Will the ST9500424AS 500GB 7200 RPM drive work in a laptop that only supports SATA 1.5Gb/s?

Yes, the SATA 3.0Gb/s interface is backward compatible with SATA 1.5Gb/s controllers, though the drive will run at the slower 1.5Gb/s link speed.

How can I confirm the 7200.5 drive is performing correctly after installation?

Run a SMART self-test and verify the drive reports 500GB capacity, 7200 RPM spindle speed, and 16MB cache in the BIOS or a disk utility.

Does the 2.5 inch 9.5mm height drive include mounting screws or a SATA cable in the box?

The OEM drive is supplied without screws, cables, brackets, or adapters; those must be sourced from the laptop chassis or purchased separately.

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