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This test mode performs a SMART drive quick self-test to gather and verify the Data Lifeguard information contained on the drive.

If you right-click your hard drive and select Run Diagnostics, you will see four test options. Then you can view the basic information about your connected hard drives, including the model number, serial number, capacity, SMART status, drive letters, file system, total space of each drive, and free space of each drive. Then run the extracted executable file to install Data LifeGuard Diagnostics for DOS or Windows.Īfter properly installing the Western Digital hard drive test tool, you can launch the application. To get this Western Digital hard drive test tool, you need to download the correct version of DLGDIAG for your operating system from the support page of Western Digital and extract the downloaded zip file. The former one is designed for DOS operating system but the diagnostic tests are only available for Western Digital hard drives, while the latter one is used on Windows operating system and you can run tests on hard drives from almost all the manufacturers. Western Digital Data LifeGuard Diagnostics tool has two versions: Data LifeGuard Diagnostics for DOS and Data LifeGuard Diagnostics for Windows. This tool also provides information about the drives’ serial and model numbers. Western Digital provides Data LifeGuard Diagnostics (DLGDIAG) for hard drive identification, diagnostics, and repairs. Test WD Hard Drives with Western Digital Data LifeGuard DiagnosticsĪlmost every major brand has its own diagnostic tools for its hard drives, and Western Digital is not an exception. Now, let’s learn about these tools one by one. Alternatively, you can also use MiniTool Partition Wizard. Western Digital Data LifeGuard Diagnostics could help you a lot. After a period of time, you might encounter problems while using the hard drive, and need to scan and repair it. When you get a new Western Digital hard drive, you might need to test its performance or check if it works properly.