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IBM Hitachi 07N8325 IC25N020ATCS04-0 20GB 2.5" IDE ATA-100 Laptop Hard Drive 9.5mm

Description

Item: IBM / Hitachi Travelstar 20GB 2.5" IDE Hard DriveModel: IC25N020ATCS04-0Part Number: 07N8325Form Factor: 2.5" / 9.5mmInterface: IDE / ATA-100Speed: 4200 RPM

This listing is for a genuine IBM Hitachi Travelstar 20GB IDE laptop hard drive. Unit has been inspected and is in good physical condition. Pulled from a working system and tested for power‑on and basic functionality. Ideal for legacy laptops, retro computing projects, or data recovery needs.

Condition:

• Used, tested for basic functionality

• Drive surface shows normal signs of use

• No broken connectors or damaged pins

What’s Included:

• IBM Hitachi 20GB IDE 2.5" HDD (as pictured)

General Information

• Brand: IBM - Hitachi Global Storage Technologies

• Series: Travelstar (40GN family)

• Model Number: IC25N020ATCS04-0

• Part Number: 07N8325

• Manufactured In: Thailand

• Drive Type: Internal 2.5-inch Laptop Hard Disk Drive

• Form Factor: 2.5-inch / 9.5mm height

• Weight: Approximately 95g

Storage and Performance

• Capacity: 20GB

• Interface: IDE / ATA-100 (PATA)

• External Transfer Rate: Up to 100 MB/s (ATA-100 theoretical)

• Internal Transfer Rate: Approximately 66.7 MB/s

• Rotational Speed: 4200 RPM

• Cache / Buffer: 2MB

• Average Seek Time: Approximately 12ms

• Average Latency: 7.14ms

Physical Characteristics

• Dimensions:

  • Length: 3.9 in

  • Width: 2.8 in

  • Height: 0.4 in Type: 44-pin IDE laptop connector

  • Jumper Options:

    • Device 0 (Master)

    • Device 1 (Slave)

    • Cable Select (CSEL)

  Technical Geometry (Printed on Drive Label)

  • LBA: 39,102,336 sectors

  • CHS: 3833 cylinders / 16 heads / 63 sectors per track

  Reliability and Environmental Ratings

  • MTBF: Approximately 300,000 hours

  • Acoustic Output:

    • Idle: ~22 dBA

    • Seek: ~24 dBA

  • Operating Temperature: 5°C to 55°C

  • Non-Operating Temperature: -40°C to 65°C

  • Shock Resistance:

    • Operating: ~100G

    • Non-Operating: with any system requiring:

      • 2.5-inch IDE / ATA-100 / ATA-5 / PATA interface

      • 9.5mm height clearance

      Ideal for:

      • Legacy laptop restoration (ThinkPad, Dell, Compaq, Toshiba, Gateway, etc.)

      • Retro operating systems (Windows 98, ME, 2000, XP, Linux, BSD)

      • Industrial machinery and embedded controllers

      • Data recovery and forensic work

      • Vintage computing projects

      Full Long-Form Description (-Ready, Clean Formatting)

      This listing is for an IBM Hitachi Travelstar 20GB 2.5-inch IDE ATA-100 Laptop Hard Drive, model IC25N020ATCS04-0, part number 07N8325. This drive belongs to the reliable Travelstar 40GN series, known for durability, low power usage, and stable performance in mobile systems.

      The drive features a 20GB capacity, 4200 RPM spindle speed, and a 2MB buffer, making it an excellent choice for legacy laptops, industrial equipment, retro computing builds, and data recovery tasks. Its ATA-100 interface ensures compatibility with a wide range of older systems that use the 44-pin IDE/PATA connector.

      The unit is a standard 9.5mm slim profile, fitting laptop bays from the late 1990s through mid-2000s. The drive geometry (3833/16/63) and LBA sector count (39,102,336) match original OEM specifications, ensuring proper recognition by BIOS and operating systems that rely on CHS-based addressing.

      Condition: The drive has been tested for power-on, spin-up, and basic read functionality. It shows normal cosmetic wear from previous use but has no damaged connectors or bent pins. Suitable for replacement, restoration, or archival use.

      Specifications:

      • Capacity: 20GB

      • Interface: IDE / ATA-100

      • Speed: 4200 RPM

      • Cache: 2MB

      • Form Factor: 2.5-inch / 9.5mm

      • Model: IC25N020ATCS04-0

      • Part Number: 07N8325

      • Manufactured in Thailand

      • Jumpers: Master / Slave / Cable Select

      • Dimensions: 3.9 x 2.8 x 0.4 inches

      • Weight: ~95g

      Included:

      • IBM Hitachi 20GB IDE HDD (exact unit shown)

      This is an excellent choice for anyone needing a dependable legacy IDE laptop drive. Perfect for ThinkPad restorations, retro gaming builds, DOS or Windows installations, or embedded systems requiring original-spec hardware.