General Specifications

• Model: DK23DA-40

• Manufacturer: Hitach

• Form ATA-5 (IDE/PATA), supporting Ultra DMA mode 5 (ATA-100

• Capacity:40.007 GB (formatted

• Cache Buffer: 2 M

• Rotational Speed: 4,200 RP

• Data Transfer Rate: Up to 100 MB

• Sector Size: 512 byte

⚙️ Performance & Reliability

• Average Seek Time: 25 m

• Average Latency: 7.1 m

• Read Technology: PRML (Partial Response Maximum Likelihood), ID-less forma

• Recording Density: Up to 600 kBP

• Track Density: 55.0 kTP

• Error Rate: Less than 1 per 10¹³ bits rea

• Reliability: No preventive maintenance require

🔌 Power Consumption

• Voltage +5V ±%

• Spin-up 0.90 A (typica)

• Seek 0.45 A (typica)

• Read/Write 0.40 A (typica)

• Idle 0.13 A (typica)

• Standby0.050 A (typica)

• Sleep 0.020 A (typica)

Environmental & Physical Specs

• *Operating Temperature: 5°C to 55°C (41°F to 131F)

• *Non-Operating Temperature: -40°C to 70°C (-40°F to 158F)

• *Operating Humidity: 5% to 90% Humidity: 5% to 95% (non-condensig)

• Shock Resistance:

  • Operatin: 250G (2 ms half sine wae)

  • Non-Operatin: 800G (1 ms half sine wae)

• Vibration Resistance:

  • Operatin: 1.0G (22–500 z)

  • Non-Operatin: 5.0G (22–500 z)

• Acoustic Noise:

  • Idl: 2.4 Bels (typicl)

  • See: 3.1 Bels 9.5mm

  • Widt: 70mm

  • Dept: 100mm

• *Weight: 9 RISC Microprocessor: Enhances performance and efficiecy.

• *Shock Sensor: Provides protection against physical shoks.

• *SMART Technology: Supports Self-Monitoring, Analysis, and Reporting Technology for reliabilty.

• **Advanced Power Management (APM)*: Optimizes power consumpton.

This listing is for a HITACHI DK23DA-40F 40.0GB 2.5" IDE Hard Drive (9.5mm height).The drive has been fully tested, verified to be in good working condition, and securely wiped for safe reuse.

This model is ideal for legacy laptops, industrial equipment, retro computing projects, and systems requiring a 2.5" IDE/PATA interface.

HITACHI DK23DA‑40F — Technical Specification SheetProduct Overview

The Hitachi DK23DA‑40F is a 40GB 2.5-inch IDE/PATA hard disk drive designed for notebook computers, embedded systems, industrial controllers, and legacy hardware requiring a 9.5mm‑height drive.Part of Hitachi’s DK23DA series, it emphasizes low power consumption, quiet operation, and high reliability for mobile and compact environments.

1. General Specifications

• Manufacturer: Hitachi Global Storage Technologies

• Model Number: DK23DA‑40F

• Series: DK23DA

• Capacity: 40.0 GB

• Form Factor: 2.5-inch

• Interface: IDE / ATA‑5 / PATA

• Height: 9.5 mm

• Weight: ~100 g (typical)

2. Performance Specifications

• Rotational Speed: 4,200 RPM

• Average Seek Time:

  • Read: ~12 ms

  • Write: ~14 Seek: 2 ms

  • Average Latency: 7.14 ms

  • Buffer / Cache Size: 2 MB (typical for this series)

  • Data Transfer Rates:

    • Internal: up to 100 MB/s

    • External (ATA‑5): up to 100 MB/s (Ultra DMA Mode 5)

  3. Physical Specifications

  • Form Factor: 69.85 mm

  • Depth: 100 mm

  • Height: 9.5 mm

• Weight: ~100 g

• Connector Type: 44‑pin IDE/PATA (laptop standard)

4. Power Requirements

• Voltage: +5V ± 5%

• Power Consumption:

  • Read/Write: ~2.0 W

  • Idle: ~0.85 W

  • Standby: ~0.15 W

  • Sleep: ~0.1 W

• Power Management: Advanced Power Management (APM) supported

5. Environmental 5°C to 55°C

Humidity: 8% to 90% (non‑condensing)

Shock (operating): 200 G (2 –40°C to 65°C

Humidity: 5% to 95%

Shock (non‑operating): 800 G (1 ms)

6. Reliability

• MTBF: ~300,000 hours

• Load/Unload Cycles: 300,000

• Error Rate: 1 per 10¹⁴ bits read

• SMART Support: Yes (Self‑Monitoring, Analysis, and Reporting Technology)

7. Compatibility

• Legacy laptops (1999–2005 era)

• Industrial controllers

• Embedded systems

• Test equipment

• Retro computing builds

• Any device requiring a 2.5" IDE/PATA 9.5mm drive

8. Model Identification

• Model: DK23DA‑40F

• Part Number Prefix: Often begins with 08Kxxxx or similar (varies by OEM)

• Firmware: Varies by batch (commonly JFxx series)

9. Included Features

• Quiet‑seek technology

• Low‑power mobile‑optimized design

• Fluid dynamic bearing motor (FDB)

• ATA‑5 command set

• SMART diagnostics

• Advanced Power Management