6.4GB 5400 RPM IDE 3.5-inch Hard Drive HDD for Legacy Desktop Industrial and Embedded Systems

Reliable legacy storage solution for older computers and equipment that require a 3.5-inch IDE / EIDE hard drive in the 6.4GB class. This listing is designed as a blanket replacement page for compatible legacy hard drives that share the same core form factor, interface, and storage class. It is ideal for retro desktop repair, industrial system maintenance, embedded equipment service, and restoration projects where modern SATA drives are not suitable.

Technical Specifications

• Storage Capacity: 6.4GB class
• Form Factor: 3.5-inch
• Interface: IDE / EIDE / PATA
• Spindle Speed: 5400 RPM or lower
• Drive Type: Internal hard disk drive
• Data Connector: Standard 40-pin IDE / ATA
• Power Connector: Standard 4-pin Molex
• Sector Format: 512-byte sector legacy architecture
• Intended Use: Legacy desktop computers, industrial controllers, embedded systems, test equipment, and retro hardware restoration
• Mounting Type: Standard 3.5-inch internal drive bay

Interchangeable / Replacement Part Numbers

0007496P, 00K4110, 00K4115, 01K1279, 02K3426, 09J0308, 09J1194, 10L6012, 10L6062, 22L0034, 25L2704, 75H9921, 89659, 90640D4, 9K2005-006, 9K2005-034, 9K2005-302, 9K2005-305, 9K2005-650, 9K2005-653, 9K2005-717, 9M9003-001, 9M9003-304, 9M9003-305, 100770-001, 103725-002, 157123-001, 158899-001, 166973-001, 179127-002, 356063-001, 386629-001, 5500771, AC-26400, AC26400, AC26400-00RN, AC26400-00RNN1, AC26400-00RNS1, AC26400-00RT, AC26400-00RTT0, AC26400-00RTT2, AC26400-60RN, AC26400-60RTT0, AC26400-60RTT3, AC26400-75RN, AC26400-75RTT0, WDAC26400, CA05367-B321, CA05367-B70200KR, CA05367-B952000M, CA05367-B97200AL, CA05367-B98200EL, D5191-63001, D5191-69001, D6452-63001, D6452-69001, D6628-63001, D6628-69001, D6748-69001, D7529-63001, D7529-69001, D8196-63001, D8196-69001, D8372-63001, D8372-69001, D8372A, DHEA-36480, DTTA-350640, EX64A013, MPE3064AT, ST36421A, ST36422A, ST36423A, ST36424A, ST36450A, ST36451A, ST36531A, ST36540A, ST64A461

✅ Confirmed Compatibility

Please note that the following list is not exhaustive. Compatibility depends on your system's specific configuration. It's essential to verify compatibility with your system or enclosure manufacturer prior to installation.

✔️ Legacy Desktop Systems: Older desktop computers that use a standard 3.5-inch IDE / EIDE hard drive with 40-pin data and 4-pin Molex power connections
✔️ IBM Systems: Aptiva, PC 300, NetVista, IntelliStation, and other IBM systems designed for 3.5-inch EIDE hard drives in the 6.4GB class
✔️ HP Legacy Systems: Older Vectra, Kayak, Brio, and similar HP business desktops that use 3.5-inch IDE storage
✔️ Compaq Legacy Systems: Deskpro, ProLinea, and other Compaq desktops or workstations with standard 3.5-inch PATA hard drive support
✔️ Gateway and eMachines Systems: Older consumer and office desktops built around standard IDE hard drive bays
✔️ Industrial and Embedded Equipment: Legacy controllers, machine interface PCs, automation systems, and embedded hardware using standard 3.5-inch IDE hard drives
✔️ Retro Computing and Restoration Projects: Vintage PC rebuilds, retro gaming systems, service benches, cloning stations, and legacy software environments requiring period-correct IDE storage

IDE SSD Upgrade Option

Looking for a quieter and more reliable upgrade path for older hardware? Consider the CM-8GB-IDE-SSD - 8GB 3.5" IDE SSD (40-Pin), a solid-state replacement designed for vintage 3.5-inch IDE systems. It offers slightly higher capacity than a 6.4GB hard drive while providing silent operation, lower power draw, and improved reliability for retro PCs, CNC controllers, arcade boards, and other legacy equipment.

☑️ Key Features

☑️ Designed for older systems that require a 3.5-inch IDE / EIDE hard drive in the 6.4GB storage class
☑️ Practical replacement option for discontinued legacy hard drives used in desktops, industrial systems, and embedded equipment
☑️ Standard 40-pin IDE data connection and 4-pin Molex power connection for broad legacy compatibility
☑️ Suitable for retro computing, system restoration, equipment repair, and maintenance of older hardware
☑️ Helps preserve compatibility with BIOS, controllers, and operating systems that expect smaller-capacity legacy hard drives
☑️ Useful for repairing older machines where SATA drives, adapters, or larger-capacity drives may not be desirable

⚙️ Fit Notes

• Verify that your system requires a 3.5-inch IDE / EIDE / PATA hard drive and not SATA, SCSI, or a 2.5-inch laptop drive.
• Legacy systems may require the drive to be configured as Master, Slave, or Cable Select depending on the system setup.
• Some older BIOS versions may require LBA support, drive overlay software, or manual geometry detection to access the full capacity of the drive.
• This blanket listing is intended for same-class functional replacement use across compatible 6.4GB IDE desktop drives.
• For data recovery, exact firmware matching, or revision-specific applications, the original exact model may still be preferred.
• Always confirm physical fit, connector type, jumper requirements, and system BIOS support before ordering.