Fixed: “Disk 1 Unknown, Not Initialized” Western Digital

November 29, 2019

Have you got the error message “Disk 1 Unknown, Not Initialized” on your Western Digital hard drive? This article will help you out in this situation.

The issue: “Disk 1 Unknown, Not Initialized” Western Digital

Western Digital (WD) provides various data storage solutions to help users capture and preserve their most valued data. Products like WD My Book, My Passport and Elements are favored by a lot of people. Popular as WD hard drives are, they disappoint users sometimes. Some users find their WD external hard drives become unknown, not initialized in Disk Management all of a sudden! How it comes and how to fix it? Please read on.

Why does the WD disk become uninitialized?

The issue of “Disk 1 Unknown, Not Initialized” Western Digital can be caused by following reasons:

  • Abrupt hard drive removal

  • Virus infection which breaks file system directly

  • MBR damage

  • Bad sectors

  • Motherboard issue, etc.

All these factors can lead to WD drives not initialized, such as WD Elements not initialized. Learn how to fix it efficiently from the next part.

How to fix the uninitialized WD hard drive efficiently?

When you find your WD external hard drive becomes unknown, not initialized, Disk Management may show you different status: “Disk 1 Unknown, Not Initialized” with “Unallocated” shown at right or “Disk 1 Unknown, Not Initialized” with no disk space shown. I’ll present how to fix the issue under two cases separately:

Case 1: Disk unknown, not initialized, unallocated

  • Fix 1: initialize WD drive in Disk Management

The first thing you can try is to initialize the WD hard drive in Disk Management directly. Keep in mind that initialization will erase all your data on the WD drive, so do file backup for your crucial data before you start. Then, follow the instructions below:

1. Right click the “This PC” icon on the desktop and hit the “Manage” option. Click on “Disk management” to open Windows Disk Management.

2. Right click on the WD drive that needs initializing and select “Initialize Disk”.

Initialize Disk

3. Follow the wizard to initialize the WD drive as MBR or GPT disk.

Initialize MBR or GPT

Tips:

>> Choose GPT if your computer uses UEFI and MBR if your computer uses BIOS. Learn more from the difference between MBR and GPT.

>> If you are unable to initialize hard drive in Disk Management because of an I/O device error, use another cable to connect the WD drive or connect it to another working computer and try again.

  • Fix 2: rebuild MBR on WD drive via a free utility

If the problem is caused by damaged MBR, you can rebuild MBR on the WD drive with a free utility—AOMEI Partition Assistant Standard. It supports all Windows PC operating systems like Windows 10/8.1/8/7/Vista/XP. Follow the steps below to fix “Disk 1 Unknown, Not Initialized” Western Digital:

1. Download, install and run AOMEI Partition Assistant. Right click the uninitialized WD drive and select “Rebuild MBR”.

Rebuild MBR Unallocated

2. Select your operating system in the pop-up window and click “OK”.

Set MBR Type

3. Click “Apply” and then “Proceed” to commit the pending operation.

Proceed

* Bad sectors on the WD drive can also lead to the error of “Disk 1 Unknown, Not Initialized”. Use AOMEI Partition Assistant to check bad sectors in this condition.

Case 2: Disk unknown, not initialized, no disk space

If Disk Management shows nothing about your WD drive, you can disconnect the drive and examine it for physical signs of damage such as dents or broken pins. Get a new drive if it’s physically damaged.

If there is no physical damage, the problem can result from a PC motherboard issue. Follow the guidance below to fix it:

1. Turn off your computer and disconnect the WD drive.

2. Remove the battery for ten more seconds.

3. Plug in the battery and turn on your computer.

4. Shut down your computer again and reconnect the WD drive.

5. Start the computer to see if the WD drive can be used now.

Summary

When you encounter the error of “Disk 1 Unknown, Not Initialized” Western Digital, you can turn to different solutions provided in this article according to your situation. Apart from repairing uninitialized WD drives, AOMEI Partition Assistant can also help you when WD Drive Utilities quick drive test failed. Get this tool right now to discover more!