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Silver rectangular 2.5 inch laptop hard drive bare unit

Toshiba

Toshiba MK1237GSX 120GB 5400 RPM 8MB Cache SATA 3.0Gb/s 2.5" laptop hard drive

SKU CH-F414-17634 MPN MK1237GSX

A 120 GB 2.5-inch SATA laptop hard drive spinning at 5400 RPM with 8 MB cache and 12 ms seek time

  • Total capacity120 GB
  • Interface typeSATA 3.0Gb/s
  • Form factor2.5 in (6.35 cm)
  • Packaging typeBare Drive
  • Cache memory8 MB
  • Average seek time12 ms
  • 120 GB capacity stores documents and media
  • 5400 RPM spindle delivers quiet operation
  • 8 MB cache speeds up frequent file access
  • SATA 3.0 Gb/s interface fits standard laptop bays
  • 300 000 hour MTTF rating indicates long service life

120GB 2.5" SATA notebook drive

This 120GB 2.5-inch SATA hard drive fits standard laptop bays that accept a 9.5mm height. It suits users replacing a failed drive or adding affordable capacity to an older machine. The 5400 RPM spindle and 8MB cache handle everyday file storage and boot duties. Buyers needing faster access times or larger capacities should consider other options.

5400 RPM thermal and acoustic profile

At 5400 RPM the drive runs cooler and quieter than faster-spinning mechanical disks during typical workloads. Average seek time is 12ms with 5.55ms latency, reflecting standard rotational speed behaviour. Power draw remains modest, helping battery life in portable systems. The 300,000-hour MTTF rating indicates baseline reliability for light use.

Bare drive SATA 3.0Gb/s integration

The bare drive connects via a SATA 3.0Gb/s interface without extra cables or brackets. Its 2.5-inch form factor and 9.5mm maximum height match most laptop drive caddies and external enclosures. No additional power adapter is required beyond the standard SATA power connector. Builders should verify bay height clearance before installation.

How it compares

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

Price $51.99
Cheaper than about 65% of the 645 comparable items (median $66.99).
Total capacity 120 GB
Lower than about 84% of the 419 comparable items (median 320 GB).
Price per TB $433.25 per TB
Pricier than about 73% of the 416 comparable items (median $233.48 per TB).

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Specifications

Product
Brand nameTOSHIBA
Model nameMK1237GSX (HDD2D62)
Total capacity120 GB
Performance
Average seek time12 ms
Mean latency5.55 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)
Max height9.5 mm
Shipping weight0.45 kg
Package size152 × 102 × 51 mm

Questions about this item

How do I install the 2.5" 9.5mm SATA drive in my laptop, and what step is often missed?

Slide the drive into the bay, secure it with the caddy screws, then connect the SATA data and power cables; the step often missed is fastening the caddy before seating the connector.

What maintenance or replacement will the MK1237GSX need later?

No scheduled maintenance is required; the drive is rated for 300000 MTTF hours, so plan replacement when SMART attributes indicate wear or after that rated lifetime.

What limit appears first during sustained writes on this 5400 RPM 8MB cache drive?

The 5400 RPM spindle and 8MB cache limit sustained throughput, so sequential write speed drops once the cache fills during large transfers.

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