4 FIXES: You Must Initialize a Disk Before Logical Disk Manager Can Access It

Jean updated on Oct 12, 2020 to Storage Media Recovery | How-to Articles

You cannot find disk partitions in Disk Management if you receive this message "You must initalize the disk before Disk Mananger can access it". To fix this issue, you must initialize the disk to MBR or GPT. Try the 4 fixes, you can initialize the disk and make it usable again on Windows 10/8/7. If you lost data, let EaseUS Data Recovery Wizard help.

Don't worry if Windows operating system warns you that "you must initialize a disk before Logical Disk Manager can access it" when your disk suddenly becomes unnitialized and unallocated as shown in the below image:

you must initialize a disk before logical disk manager can access it

This page includes one quick fix and other four efficient solutions to help you get rid if this issue with ease. Check out how to make your unlitialized disk detecable again without losing any data:

# Fix 1. Initialize the Disk to MBR or GPT and Recover Data
# Fix 2. Update 'not initialized' Drive Driver
# Fix 3. Uninstall & Reisntall Disk Drive of the "Not Initialized" Disk
# Fix 4. Reinstall All USB Controllers

Initialize Disk - You must initialize a disk before Logical Disk Manager can access it

Are you one of the hard drive owners who receive such a Windows prompt that warns you to initalize your disk? Do you feel a sense of anxiety when you're faced with a choice?

Being different from another similar error titled with "disk unknown not initialized", the suggested solution towards the "You must initialize a disk" issue is given along with the error message. It means that you must use either MBR or GPT as the partition style for the selected disk by initializing it.

However, many people still feel puzzled as they don't know whether the solution can be applied on both new and used hard disk. Continue reading, and you will figure out why would Windows recommend to you do so:

# 1. Identify your disk - a new or a used disk

1. Brand new hard disk: The hard drive is a completely new, unformatted hard drive without anything on it so far.
2. Used hard drive: It's a hard drive that is already in use. It contains a plenty of data files on it.

# 2. The differences of initializing a new disk or a used drive

First, for a brand new disk: The case of "You must initialize a disk before..." implies that Windows cannot access the drive you have connected to it. Initializing the disk will rebuild the MBR on the disk so to enable Windows OS access to the targte disk. By doing so, you can create partitions on the disk and use the disk to save data.

Second, for the disk that has already been in use: Due to disk driver or other issues, the disk becomes undetectable by Windows and you have to reinitialize the disk. However, initializing will result in a complete data loss on it. In this case, data recovery should be executed immediately once you initialize the disk.

How to Fix "You must initialize a disk" Error without Losing Data

The provided fixes are also applicable to remove the same error from your external hard drive, USB, pen drive, SSD, etc., devices.

You should know that the "You must initialize a disk" issue may also happen to an SSD, external hard dirve, USB flash drive, etc., devices. Continue reading and choose the right fix to get rid of this issue from your hard drive without losing data.

Quick Fix - Reconnect disk to PC

Sometimes, if your disk is not correctly inserted or connect to your computer, Windows OS won't be able to load the device and you may even receive the error message. A quick fix towards this issue is to unplug the disk from your computer, check the SATA and power cable, and reconnect it to your computer correctly.

If it doesn't work, the connection of your drive is all right, try any fix below to make your drive work again.

Fix 1. Initialize the Disk to MBR or GPT and Recover Data

Provided that your external HDD, SSD or USB is not a faulty one or completely dead (there is no way but replace it), initializing should be the quickest and easiest way to solve the pending problem. Finally, you can download EaseUS hard drive recovery software to recover data from a hard drive after initializing. That's the other way to protect you from losing everything on it.

First. Initialize the disk - HDD/SSD/USB

Work on both new and old disk with "you must initialize the disk" issue. The easiest way to initialize a disk is using Disk Managment with below steps:

Step 1. Right-click "This PC" and choose "Manage" to enter "Disk Management".

Step 2. Right-click the disk showing "Not Initialized" and choose "Initialize Disk"

Select target disk to initialize

Step 3. In the "Initialize Disk" windows, choose the best-matched disk style - MBR or GPT, and click "OK" to continue.

Select the partition style to initialize the disk

The Disk Manager will now start processing. After it finished, as for the new drive, it's ready for to you create partitions and save files. See also: How to Partition a Hard Drive.

For your used hard drive, all its partitions will show up there. If the data lost due to initializing disk, follow the next guide to recover them all.

Second. Recover Lost Data from HDD/SSD/USB

As long as Windows correctly detects your drive, so it will be detected by EaseUS Data Recovery Wizard. You just need to run the software, select your hard drive and click Scan to find all disappearing files:

Step 1. Choose and scan hard drive partition.

On EaseUS Data Recovery Wizard, select the hard drive partition where you lost data and click "Scan".

select your hard drive and click scan

Step 2. Preview found hard drive data from the scan result.

When the scan completes, find lost hard drive data in "Deleted Files", "Lost Files". Filter and Search features can also help you access lost files via file types, file names or extensions. Double-click to preview these lost files. 

scan the lost data on the hard drive

Step 3. Recover lost hard drive data.

Select all the lost hard drive files and click the Recover button to save them to another secure location. (You can always choose to preview files before purchasing a license code for a full hard drive data recovery. )

select files and click recover

After this, you can continue use your drive to save data again. To avoid further issues occur again, you may need to continue following fixes below.

Fix 2. Update 'not initialized' Drive Driver

This method does not work 100% compared to Fix #1, however, data will not be affected at all. It's still worth to try.

Step 1. Open Device Manager. (Click My Computer or This PC and then Manage. Choose Device Manager under the System Tools.)

Step 2. Double-click the device name to open the driver properties window.

Step 3. Go to the "Driver" tab and click Update Driver.

update driver to fix 'you must initialize a disk before logical disk manager can access

Step 4. Click Search automatically for updated driver software.

Wait for the process to finish, and now your disk driver has been updated to the latest one.

Fix 3. Uninstall & Reisntall Disk Drive of the "Not Initialized" Disk

Step 1. Open Device Manager and expand the Disk drives.

Step 2. Right-click on your disk drive and choose "Uninstall" device.

update disk drive driver

Step 3. Go through the wizard guide and then reboot your computer.

The computer will automatically reinstall the driver which you have uninstalled.

Fix 4. Reinstall All USB Controllers

Sometimes, when your device not detected, it's probably casued by problematic USB controllers. Here are the steps that you can follow to reinstall the USB controllers for your device, expecially the not initialized one:

Step 1. Right-click on the Windows icon and select "Device Manager".

Step 2. Under Universal Serial Bus controllers, right-click on USB controllers of your problematic drive and select "Uninstall".

Reinstall WD USB controllers to make it work again.

Step 3. Restart the computer and Microsoft will automatically reinstall the USB controllers software for your drive.

After this, you shall be able to visit and access saved data on your hard drive normally by then.


On this page, we collected one quick fix and 4 practical fixes to help you out when you receive the error message of "You must initialize a disk before Logical Disk Manager can access it".

Basically, initializing disk and data recovery software in Fix 1 will resolve this issue for you at one time.

However, if your disk displays as not initialized in Disk Management, it will become undetectable. You will need to update drive driver, uninstall disk drive or reinstall the USB controllers to make the drive detectable again.

People Also Ask

In fact, we've kept studying many disk initializing error and related issues. We also connected 3 top concerned questions from Google and find the best answer to these questions.

If you are intereseted in, check the answer here now:

1. Will initialize a disk erase data?

Will initializing disk erase data on it? The answer is both "Yes" and "No". Solely initializing a disk won't erase its data. But in order to use the disk, you need to further partition and format the disk, which will cause data loss. Thus, if you don't want to lose files existing on your hard drive, using data recovery software is necessary.

For more details, you should refer to How to recover data from a hard drive after initializing for help.

2. How do I initialize my new SSD?

To initialize your new SSD by using Disk Management as recommended in Fix 1. Besides this, you can also apply another two methods to initialize your SSD:

1). Using CMD initializing disk command; 2). Using EaseUS Partition Master with its Initialize Disk feature.

Both two methods are practical and efficient in executing this task. For more detals, see also: How to Initialize a HDD/SSD.

3. Should I initialize MBR or GPT?

To answer the question of How should you initialize disk to MBR or GPT, you should first understand your initial intend.

1). To use disk as new system disk:

To do so, you should open Disk Management > Right-click your system disk and select "Properties" > Check the disk partition style. If it's MBR, you should initialize the disk to MBR. If it's GPT, initialize to GPT.

2). To use the disk as a data drive:

If you need to create more than 4 primary partitions and your disk is more than 2TB, initialize it to GPT. If not, initialize it to MBR.

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Frequently Asked Questions

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It is recommended to check the version installed is Free or Trial because they are different versions.

Trial has data preview function but cannot save any files, while the Free version enables to recover 2 GB files. The default free space is 500 MB and you may share the product on social media to get another 1.5 GB.

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A file is saved as 2 parts on the storage device: directory info (which is comprised by file name, time stamp and size info, etc.) and data content.

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4. Why isn't it suggested to recover the files back to the original drive?

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The Free version helps you save 2GB files, so verify the recovery quality of our product before purchase.

6. How long does it take to scan the drive?

It strongly depends on the capacity of your hard drive and the performance of your computer. As reference,most drive recoveries can be completed in around 10 to 12 hours for a 1-TB healthy hard drive in general conditions.

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