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Initialize HDD/SSD for Free and Fix 'Disk Unknown Not Initialized' Error

2017-03-10 17:05:55 Posted by Tracy King to Partition Manager

New HDD or SSD failed to show up in your PC? Keep receiving “Disk Unknown Not Initialized” error message when you try to create new partition on your brand new HDD or SSD? Relax! Effective methods are available here to help you fix disk not initialized error and guide you to initialize HDD or SSD for free now.

"Hi there, do you know how to initialize a new SSD in PC? I recently bought a new SSD and I added into my computer but it won’t allow me to create new partition. It keeps asking me to initialize the disk with an error message “ Disk Unknown is not initialized”. How can I fix this issue?"

Why need to initialize HDD/SSD?

Are you having a similar problem with your SSD or HDD that the disk drive is not responding or stay with unallocated condition? Do you know why the system keeps asking you or forcing you to initialize HDD/SSD? Here below are the reasons and cases that you are in and why you have to initialize SSD or HDD:

  • New HDD or SSD not show up in PC;

When a brand new SSD or HDD is plugged into PC, it may not show up in This PC/Computer immediately. You have to initialize it so to make it detectable and work for storing data;

  • "Disk Unknown Not Initialized" error;

Error message such as “ Disk 0 is unknown, not initialized, unallocated” may pop up if you try to open a solid state disk or hard disk drive. This problem can occur to all Windows systems including Windows 10/8/7 and the only way is to fix ‘disk not initialized’ error.

  • Logical Disk Manager cannot access a disk since its not initialized;

Sometimes, if a hard disk or SSD is not initialized into MBR or GPT, the system may warn you with an error message "You must initialize a disk before Logical Disk Manager can access it".

How to fix "Disk unknown not initialized" error?
Initialize SSD/HDD to MBR/GPT within 3 simple steps for free

If you think the above-offered methods are too complex for you to free initialize disk, you can apply professional partition manger software - EaseUS Partition Master Free for help.

Note: Backup important data if you have stored data in the not initialized HDD or SSD.

This software allows you to initialize SSD or HDD into MBR disk within 3 simple steps:

1. Download, install and run EaseUS Partition Master Free;

2.Right-click the not initialized disk which usually shows up as "*" and select "Initialize to MBR" or "Initialize to GPT";

Initialize SSD/HDD.

3. Click Apply and reboot PC to keep all changes.

How to initialize SSD/HDD in Windows 10/8/7?

Note: In order to avoid unnecessary data loss error, please backup important data in the not initialized disk.

So how to initialize an SSD or HDD disk under different Windows system such as Widows 10/8 or 7? Here below you’ll find recommended free methods to initialize disk without losing data now:

Method 1. Use Disk Management to initialize SSD/HDD in Windows 10/8/7

For Windows 10/8 users:

  • Press Win + R, and type: diskmgmt.msc and click OK or right-click on This PC and select Manage to open Disk Management tool;
  • Find the HDD or SSD that you need to initialize and right-click on it, select Initialize Disk;
  • Select the disk to initialize and set the disk as MBR or GPT;

After this, reboot PC to keep all changes and then your disk can be used properly.

For Windows 7 users:

  • Right-click Computer and select Manage to open Disk Management;
  • Right-click on the not initialized disk (HDD or SSD) and select Initialize Disk;
  • Select the disk(s) to initialize in the Initialize Disk dialog box and set the disk partition as MBR or GPT;

Reboot PC and then your disk will be initialized to create new partitions on it for storing new data.

Method 2. Run CMD to initialize HDD or SSD

If you have important data in your not initialized disk, please do remember to backup data into another safe disk or external storage device. CMD command may erase all data on your disk which you want to initialize.

1. Press Win+R and type: diskpart and hit Enter;
2. Type: list disk and hit Enter;
3. Type: select disk G and hit Enter; (G shall be the drive letter of your not initialized disk.)
4. Type: clean and hit Enter;
5. Type: convert gpt or convert mbr and hit Enter;
6. Type: create partition primary and hit Enter;
7. Type: format quick fs=ntfs and hit Enter;
8. Type: assign and hit Enter;
9. Type: exit and hit Enter.
There, you’ve finished the disk initialize process with the above commands.