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[Solved] Disk Unknown Not Initialized in Windows 10/8/7/2008, How to Fix?

Updated on Aug 07, 2018 by Abby Haines to Resource

Summary

Here, 4 solutions for disk unknown not initialized error are available: recover data and initialize the hard drive, fix MBR, check and repair disk errors and recover partition. Try them one by one to fix disk 1 or 2 unknown not initialized unallocated space error on your external hard drive in Windows 10, 8, 7, 2008......

Windows 10: Disk 1 is unknown, not initialized, unallocated - external Western Digital hard drive

"When I plug in my external hard drive, Western Digital My Passport 0740 (500GB), it says that it's successfully installed however it does not appear on My Computer. Also when I go into system tools it says that disk 1 is unknown, not initialized, unallocated. Anyone knows how to recover data when hard drive not initialized or how to initialize disk without losing data? I have some important pics on the disk. please help!"

Overview of disk unknown not initialized issue

Like the above cases, "Disk Unknown Not Initialized" issue usually attacks unexpectedly in all the Windows version of Windows 10, 8, 7, 2008 and annoys numerous users. When it happens, your external hard drive may show "unallocated space" or nothing in Disk Management, so you are not able to go access the data on this disk.

Disk Unknown Not Initialized

Disk unknown not initialized issue can be caused by various reasons like virus infection, file system damage, bad sectors, MBR corruption, partition loss, etc. If you can't figure out the cause, please try the following 4 solutions one by one until the issue is solved successfully!

How to fix Disk Unknown Not Initialized error in Windows 10, 8, 7, 2008......

Recommend: Initialize the hard drive and then recover data 

It is the easiest way to fix disk unknown not initialized issue. Just right-click My Computer --> Manage to run Disk Management, Here, right-click the hard drive and click "Initialize Disk". In the dialog box, select the disk(s) to initialize and choose MBR or GPT partition style.

Initialize the hard drive to fix disk unknown not initialized error

To recover data after fixing disk unknown not initialized error:

Here, if you have important files on the external hard drive, you can try EaseUS free data recovery software to retrieve them after disk initializing.

Notice: When your hard drive/external hard drive becomes uninitialized, please find fixes and resolve this issue firstly.
After fixing the not initialized error, try powerful hard drive recovery software to restore your lost data now.

Step 1. If it is an external hard drive, please connect it to the PC first.

Step 2. Run data recovery software to scan data.

  • Select the location of your hard drive/external hard drive.
  • Click "Scan" to start scanning lost data on the hard drive。
Run hard drive recovery software.

Step 3. Preview and restore.

Once the scanning process completes, you can preview and find your lost files by browsing them in these tabs:

  • Delete Files: All your deleted files are listed here.
  • Drive (with your device name): It loads all found files there.
  • Lost Partition Files: Check first if it's for formatted recovery.
  • Extra Files: Finds all files that lost names or paths on your drive. (It suits your situation the most right now.)
Preview and find lost hard drive data from not initialized error.
  • And you can double-click the found files one by one to preview.
  • Then select and save them to a secure location on your PC or other storage devices by clicking "Recover".
Restore lost data on hard drive from not initialized error.

Solution 2: Fix or rebuild MBR

1. Download and launch EaseUS free partition software.
2. Select the external hard drive, right-click and select "Rebuild MBR", and then choose the proper Operating System version.
3. Apply the operation to add a pending operation of rebuilding MBR.

Rebuild MBR to fix Disk Unknown Not Initialized error in Windows 10, 8, 7, 2008......

Solution 3: Check and repair bad sectors and disk error

1. Download and launch EaseUS free partition software, right-click the hard drive and click "Check partition".
2. Choose the way that you want to use to check and repair bad sectors: "Check Partition Properties", "Call Windows Chkdsk" or "Surface Test" and Click "OK" to continue.
3. Let the software automatically check and repair bad sectors. And finally, click "OK" to finish the process.

Remove bad sectors to fix Disk Unknown Not Initialized error in Windows 10, 8, 7, 2008......

Solution 4: Make a partition recovery

1. Download and launch EaseUS free partition software, go to Wizard > Partition recovery wizard, click "Next" to open EaseUSPartition recovery wizard.
2. Choose Automatic recovery mode or Manual recovery mode, and click "Next" to make the software search deleted or lost partitions on the hard drive.
3. After searching, select the partitions you want to recover and click "Next" to continue. Finally, click "Proceed" to confirm the recovery operation.