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Silver rectangular 2.5 inch bare hard drive with label showing 5.4GB 4200RPM

IBM

IBM DADA-25400 (03L5630) 5.4GB 4200RPM 2.5" laptop hard drive

SKU CH-947V-4QMPJ

A 5.4 GB, 4200 RPM 2.5-inch internal hard drive for laptops

  • Form factor2.5 in (6.35 cm)
  • Rotational speed4,200 RPM
  • 4 GB capacity stores more files on a 2.5" laptop drive
  • 4200 RPM spindle speed delivers steady read performance
  • New bare drive arrives ready for immediate installation
  • Part number 03L5630 matches legacy IBM ThinkPad service manuals

5.4 GB 2.5" laptop drive for legacy systems

This 5.4 GB IBM DADA-25400 spins at 4200 RPM in a standard 2.5 inch form factor. It suits technicians restoring vintage ThinkPad or compatible notebooks that require an exact-capacity replacement. The drive installs directly into period-correct bays without adapters. Buyers needing larger capacities for modern workloads should look elsewhere.

Bare drive ships without cables or mounting hardware

The unit arrives as a bare drive only; no ribbon cable, screws, caddy or installation software are included. Retail or OEM packaging may vary by lot. Installers must reuse existing brackets and connectors from the original system. Systems lacking a free 2.5 inch bay cannot accommodate this drive.

How it compares

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

Price $136.99
Pricier than about 75% of the 645 comparable items (median $66.99).

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Specifications

Product
Brand nameIBM
Model nameDADA-25400 (03L5630)
Performance
Rotational speed4,200 RPM
Size & build
Form factor2.5 in (6.35 cm)

Questions about this item

Will the 2.5" drive bay need any adapter when I swap this unit out later?

The drive uses the standard 2.5" form factor so it fits the same bay without an adapter.

At 4200 RPM what is the first bottleneck I will hit during sustained transfers?

The 4200 RPM spindle speed limits sustained throughput before the interface becomes a factor.

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