Maxtor D740X-6L 40GB IDE Hard Drive 3.5" MX6L040J2 Dell 7J378 ATA Internal

Maxtor D740X-6L 40GB IDE Hard Drive 3.5" MX6L040J2 Dell 7J378 ATA Internal

The Maxtor D740X-6L is a 40GB 3.5-inch IDE (PATA) internal hard drive from Maxtor's DiamondMax series, designed for desktop computers. This unit carries the Maxtor part number MX6L040J2 and the Dell OEM part number 7J378, making it a direct-fit replacement for Dell desktop systems that originally shipped with this drive. It has been wiped and formatted at our facility and boots to a waiting C:\ prompt, ready for a fresh operating system installation.

Specifications & What's Included

• Brand: Maxtor
• Model: D740X-6L (DiamondMax series)
• Maxtor MPN: MX6L040J2
• Maxtor QTLA: VQ40A011-01-3
• Dell Part Number: 7J378 (Full Dell P/N: JP-07J378-12541-22K-168R)
• Additional P/N: 253454-001
• FRU: 19K1568
• Revision: A00
• Capacity: 40 GB
• Interface: IDE / ATA (PATA) — 40-pin IDE ribbon connector
• Form Factor: 3.5-inch desktop
• Power Connector: 4-pin Molex
• Drive wiped, formatted, and boots to a waiting C:\ prompt

Applications

The Maxtor DiamondMax D740X series was a mainstream desktop hard drive line from the early 2000s, widely used as OEM storage in Dell OptiPlex, Dimension, and similar desktop systems of that era. IDE (PATA) was the dominant desktop storage interface through the late 1990s and early 2000s before SATA took over, so these drives are compatible with any desktop motherboard or add-in controller card featuring a standard 40-pin IDE header. Today they are commonly sought as replacement drives for legacy desktop systems, vintage PC builds, older industrial computers, and embedded controllers that require IDE storage. The Dell OEM part number also makes this a straightforward drop-in replacement for any Dell system originally configured with this exact drive.