Disk 1 Unknown Not Initialized External Hard Drive
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This CMD command would erase all data on the uninitialized hard drive, which you can later restore after repairing the external hard drive not initialized, with the help of any data recovery or partition recovery software:
Once you have completed the wizard, the WD Passport drive will be initialized, allocated, and ready for use. It should now appear as a usable drive with the assigned drive letter in the Disk Management window.
As for a used hard drive, you may need to copy or back up all saved data to another device first. Then, use Disk Management to delete all existing partitions. Then, continue with the following steps to initialize the drive:
Therefore, if you don't want to lose files stored on your hard drive, using data recovery software is necessary. You may refer to recover data from unknown not initialized hard drive for detailed instructions.
"When I plugged in my external hard drive, Western Digital My Passport 0740 (500GB), PC said that it's successfully installed however it did not appear on My Computer. Also, when I went into system tools, it said disk 1 is unknown, not initialized, and unallocated. Does anyone know how to recover data when a hard drive is not initialized or how to initialize disk without losing data?"
Like the case above, the disk unknown not initialized issue usually occurs unexpectedly in all the Windows versions, including Windows 11, Windows 10, Windows 8 and 7, and it annoys users. When the issue occurs, your external hard drive may show "unallocated space" or nothing about the disk capacity in Disk Management (as shown in the image below), so you cannot open and access the data on this disk.
Although the disk shows unknown and not Initialized in both situations, they present different information about the hard drive's capacity, which means different reasons cause them. The most common problem is MBR corruption.
If disk unknown not initialized is accompanied by unallocated, the likely cause is MBR corruption on the hard drive. MBR, which stands for Master Boot Record, is the first sector on an MBR or GPT disk. It provides information on loading Windows and on the partition of the disk. Thus, when it is corrupted, you will certainly encounter issues, including the disk showing as not initialized.
To fix a disk from turning into not initialized in such a case, you can initialize the disk directly. Then comes the question - does initializing a disk erase data? Actually, initializing a disk will rebuild the master boot record and format the hard drive. It will erase the files on your disk. In this article, we will introduce six methods to fix the disk not initialized without data loss, and you can gather information quickly from the following table:
Physical damage will inevitably result in serious issues on a storage medium, including disk unknown not initialized. If the methods above fail to solve the problem for you, sending your device to professionals for manual repair is a good choice.
A common reason that leads to disk unknown not initialized is that you fail to initialize the drive with a message saying the request could not be performed because of I/O error appears. This causes your disk to be shown as unknown or not initialized.
When you can't initialize a hard disk, disk unknown not initialized is not the only issue you encounter. For detailed explanations and corresponding solutions, head to our article about how to fix the i/O device error.
In Computer Management - Disk Management, my second hard drive is shown as Unknown, Not Initialized and Unallocated (with the hard drive space capacity). I tried to initialize the HDD but encountered I/O device error.
When you try to use an external hard drive on your Windows 10, you may meet the problem that your Disk 1 unknown not initialized in Windows Disk Management. It is shown as Disk unknown, not initialized, no disk space, like the following screenshot:
5. MBR corruption. There is a first sector where the MBR code and partition table are written. If MBR is corrupted, the operating system fails to access data on the hard drive, and bad things may happen.
Thus, you need to turn off the PC, disconnect the hard drive, and remove the battery for a while. After ten more seconds, insert the storm, and turn on the computer. Then, shut down the computer, reconnect the hard drive to your PC and restart the PC.
Another situation of Disk 1 unknown not initialized in Windows 10 or Windows 11 is Disk unknown, not initialized, unallocated space. And for this situation, you can do the following methods to fix it.
Step 1. Connect the external hard drive to your Windows 10 computer. Free download AOMEI Partition Assistant, install and launch it. It will show you the main hard drives on your computer and you can see the external hard disk unknown not initialized in Windows 10.
Actually, AOMEI Partition Assistant is a great partition manager that can help you manage your hard disk better. You can use it to get more reasonable partitions by creating, deleting, resizing partitions, or you can use it to initialize disk, rebuild MBR to solve the "Disk 1 unknown not initialized Windows 10" issue.
You can also upgrade to AOMEI Partition Professional to get more advanced features, like testing hard drive speed, migrating OS to SSD, converting MBR and GPT without deleting partitions, recovering lost partitions, etc.
The "disk unknown not initialized" error is a common disk issue in Windows 11, 10, 8, and 7 and it usually happens to an external hard drive. It will show as "unallocated space" or no disk space in Disk Management.
The "disk unknown not initialized" error like disk 0 unknown not initialized, disk 1 unknown not initialized, etc can occur due to different reasons, such as outdated or damaged driver, virus attack, bad sectors, partition loss, file system error, MBR corruption, etc.
As you can see above, this error may be a little different, as the unknown not initialized disk sometimes shows no size. The most likely cause in this case is MBR damage. MBR, standing for Master Boot Record, is the first sector on an MBR or GPT disk that contains essential information about loading Windows and managing disk partitions.
Recovering data from not initialized disk is the most important things if you are sure there are important data on the disk. MyRecover is one of the most powerful data recovery software in Windows 11, 10, 8, 7, etc and able to recover data from health/problematic/damaged disk. It can be internal or external disk, USB drive, SD card, etc.
Step 3: Select all the deleted or lost files on the unknown uninitialized disk and click the Recover x files button. You will then be asked to select a location. Please select a new location instead of the original location.
Initializing a disk will delete all the data on it. To be safe, you can choose to check the disk connection first. It may also cause the disk unknown not initialized error, show as not initialized, or display no information about disk capacity.
If you want to fix an unknown not initialized disk without losing data, you need to recover data from uninitialized disk with a professional data recovery software first. It will find out and recover all of your data on this disk quickly and successfully.
You can easily fix these with any of these methods or solutions. Restart your computer, initialize the external hard disk on your computer, rebuild Master Booth Record (MBR). Run CHKDSK to repair the disc and also clean the drive,
Have you ever faced an issue When you plug in your external hard disk to the computer and find the notification that says that the drive has been successfully installed, but it does not appear on "This PC"?
When this sort of issue occurs, your computer may show your external hard drive, but it will not authorize access, and it will also refuse to acknowledge the data inside. In this section, we will discuss some of the reasons which cause your drive to be severely unresponsive.
If the issue with the hard drive remains the same even after plugging it in on a different computer or after Unplugging/Replugging the disk from the same PC. And if it still shows the message that "your disk is unknown and not initialized" then follow our list of solutions that could help you in accessing the external Hard Drive or recover the data inside during the process.
While checking the status of the drive through the disk management utility, if you find unallocated space right next to your external disk icon, then you must perform the initialization process on the device. Follow our step-by-step guide to initialize the drive.
MRB or Master Boot Record is a partition and the first sector of the computer hard drive that tells the PC how the storage drive is partitioned. It is also very susceptible to boot sector viruses that can corrupt or remove the MBR on your external hard drive, thus causing the "disk not initialized and unallocated" problem. The older Master Boot Record (MBR) is used on 32-bit older PCs that run Windows XP/7/8, and on removable drives such as memory cards, etc. In this day and age, GPT is more strong and works for drives bigger than 2 TB storage.
You can use the CHKDSK facility, which scans the integrity of the file system of your external hard drive by detecting its good and the bad sectors. You can utilize this feature by using the command prompt on your PC. Follow our steps to run the command on the Windows cmd utility.
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