73H7693 DDLA-21620 - 1.6GB 1620MB 2.5 IDE PATA Hard Drive for Legacy Laptops CNC and Industrial Systems

1620MB legacy 2.5-inch IDE / PATA hard drive for compatible vintage laptops, CNC controls, industrial PCs, embedded systems, test equipment, and machine tool computers that require a small-capacity 44-pin laptop-style IDE hard drive. This drive is intended for older systems where BIOS limitations, drive geometry, operating system requirements, or machine control software may require a low-capacity replacement instead of a modern high-capacity drive.

Technical Specifications

• Primary Part Number: 73H7693
• Model Number: DDLA-21620
• Part Type: Internal laptop-style hard disk drive
• Capacity: 1620MB / 1.62GB class
• Form Factor: 2.5-inch hard drive
• Interface: IDE / PATA / ATA
• Connector Type: 44-pin 2.5-inch IDE connector
• Power Requirement: 5V
• Rated Current: 500mA
• Drive Geometry: 3152 cylinders, 16 heads, 63 sectors per track
• Jumper Settings: Device 0, Device 1, Cable Select
• Common Use: Legacy boot drive, replacement system drive, CNC control drive, industrial controller storage, vintage laptop storage
• Installation Type: Internal screw-mounted 2.5-inch IDE hard drive
• Not Compatible With: SATA, SAS, SCSI, mSATA, M.2, 1.8-inch ZIF, CompactFlash-only slots, or 3.5-inch IDE bays without the proper adapter

Interchangeable / Replacement Part Numbers

73H7693, DDLA-21620, DDLA21620, DDLA-21620 E182115 S

Additional Label / Build References

1620MB MLC, E67266, 73H7693E67266S7B

Same-Capacity Compatibility Note

Only the verified 1620MB / 1.62GB-class part numbers and label references are listed above. Nearby 1.35GB, 1.44GB, 1.6GB, 1.7GB, 2.0GB, 2.1GB, and 2.16GB 2.5-inch IDE drives were intentionally not added to the interchangeable part number list because they are not the same exact labeled capacity.

✅ Confirmed Compatibility

Please note that the following list is not exhaustive. Compatibility depends on your system’s specific configuration, BIOS limitations, original drive capacity, hard drive caddy, connector type, drive height clearance, jumper setting, operating system, and machine control software. It’s essential to verify compatibility with your original hard drive part number, IDE connector type, and required capacity before installation.

✔ 2.5-Inch IDE / PATA Laptop Drive Bays: Compatible with systems requiring a standard 2.5-inch laptop-style 44-pin IDE / PATA hard drive. The 44-pin 2.5-inch PATA connector is the laptop version of the IDE interface and carries both data and power through the connector.
✔ IBM ThinkPad 310 Series: ThinkPad 310E, 310ED and related configurations originally offered with 1.6GB / 2.1GB-era IDE hard drive options.
✔ IBM ThinkPad 365 Series: ThinkPad 365X, 365XD and related configurations using 2.5-inch IDE storage in the 1.35GB to 2.01GB-era capacity range.
✔ IBM ThinkPad 760 Series: ThinkPad 760C, 760CD, 760E, 760EL, 760ED, 760ELD and related configurations using legacy 2.5-inch IDE storage in the 720MB, 810MB, 1.08GB, 1.2GB, 1.35GB, and 2.1GB-era range.
✔ IBM ThinkPad 380 Series: ThinkPad 380, 380D, 380E, 380ED, 380XD, 385D, 385ED and related models using legacy 2.5-inch IDE hard drives in early laptop capacity ranges.
✔ IBM ThinkPad 560 Series: ThinkPad 560, 560E, 560X, 560Z and related configurations using 2.5-inch IDE laptop storage.
✔ Toshiba Libretto Legacy Portables: Libretto 70CT and other compatible Libretto models using small-capacity 2.5-inch IDE hard drives, especially systems originally configured around 1.6GB / 2.1GB-era storage.
✔ Toshiba Tecra Legacy Portables: Tecra 500CS, 500CDT, 510CDS, 510CDT, 520CDT, 530CDT and related Pentium-era Tecra systems using 2.5-inch IDE hard drive storage.
✔ Toshiba Satellite Pro 400 Series: Satellite Pro 400CS, 400CDT, 405CS, 410CS, 410CDT, 415CS, 420CDS, 420CDT, 430CDS, 430CDT, 435CDS, 440CDT and related 1990s Satellite Pro configurations using legacy 2.5-inch IDE drives.
✔ HP OmniBook Legacy Systems: OmniBook 5500, 800CT, 800CS and related OmniBook models using small-capacity 2.5-inch IDE hard drive configurations.
✔ Compaq LTE Legacy Systems: LTE 5000, LTE 5100, LTE 5150, LTE 5200, LTE 5250, LTE 5280, LTE 5300, LTE 5380, LTE 5400 and related systems using early laptop IDE storage configurations.
✔ Compaq Armada Legacy Systems: Armada 1500, 1700, 3500, 7400, 7800 and related systems when configured with a compatible 2.5-inch IDE hard drive caddy and BIOS support.
✔ CNC / Industrial Control Applications: Compatible with legacy industrial PCs, CNC operator panels, machine tool computers, HMI systems, test equipment, and embedded controllers that specifically require a 1620MB-class 2.5-inch 44-pin IDE / PATA hard drive.
✔ Legacy Machine Tool Applications: May be suitable for compatible FANUC, Mitsubishi, Siemens / SINUMERIK, Heidenhain, Mazak, Okuma, Mori Seiki, Haas, Fadal, Bridgeport, Hurco, and other machine control environments only when the original system uses the same 2.5-inch IDE interface and supports this drive capacity.

☑️ Key Features

☑️ 1620MB / 1.62GB-class legacy hard drive for older systems
☑️ 2.5-inch IDE / PATA form factor for laptop-style drive bays
☑️ 44-pin connector for compatible notebook, embedded, and industrial systems
☑️ Useful replacement for old CNC controls and industrial PCs with BIOS capacity limits
☑️ Good fit for systems that cannot reliably detect larger modern IDE drives
☑️ Supports Device 0, Device 1, and Cable Select jumper configurations
☑️ Helps preserve original machine software environments, DOS installs, CNC parameters, and legacy operating system setups
☑️ Suitable for repair, restoration, cloning, and legacy equipment maintenance
☑️ Direct replacement when the original drive part number, capacity, connector, and mounting style match

⚙️ Fit Notes

• Match your original hard drive part number whenever possible.
• This listing is for a 1620MB / 1.62GB-class 2.5-inch IDE / PATA hard drive.
• Confirm your system uses a 44-pin 2.5-inch IDE connector before ordering.
• This is not a SATA drive and will not connect to a SATA-only system.
• This is not a 3.5-inch desktop IDE drive.
• Confirm the original drive capacity if your system has BIOS or machine-control software limitations.
• Some legacy systems require the drive to be configured as Device 0, Device 1, or Cable Select using the jumper setting.
• Some laptops and CNC controls require the original drive caddy, adapter board, rails, screws, or mounting bracket to be reused.
• Some systems may require manual BIOS geometry settings using cylinders, heads, and sectors.
• If replacing a CNC or industrial control drive, clone the original drive whenever possible before installation.