A brand new hard disk drive comes completely unallocated. An unallocated drive means a hard drive which is not assigned to any drive letter. So, while installing the operating system on your new computer you need to partition that unallocated hard drive. Since you can't use a hard drive without allocating.
In some circumstances, existing hard drives (the disk drive which you are using) will also have unallocated space. The unallocated space on a hard drive indicates that the space on a disk does not belong to any partition and no data can be written to it. In order to use that unallocated space either you need to create a new partition or expand the current partition on the drive.
But, in some rare cases, an entire hard drive becomes unallocated! Yes, at times, your well-functioning hard drive shows up as unallocated all of a sudden for no reason, making all your files and folders stored in it inaccessible.
So, this article lets know why your HDD becomes unallocated and how to fix it without losing any data from it.
Why Hard Drives Became Unallocated?
Generally, your hard disk drive turns unallocated due to basic reasons such as,
- File system damage, corruption or error
- Internal error
- An inappropriate way of handling hard drives like ejecting improperly
- Virus attack on hard drives
- Accumulation of bad sectors
- Outdated hard drive driver software, etc.
Even though there are numerous causes responsible for an unallocated drive, you can easily fix the issue in a few easy techniques. But, if you have important files saved on the unallocated hard drive then it is suggested to recover those files first, in order to avoid data loss.
How to Recover Data from Unallocated Hard Drive?
You can easily recover data from unallocated hard drives using a reliable data recovery software - Remo Recover. This effective data recovery tool can be used to restore data from unallocated hard drives or external hard drives. It easily recovers numerous file types like audio, video, images, RAW images, documents, Office files, ZIP/RAR archives, etc. from unallocated space on hard drive. With this tool, you can easily restore files from quick formatted drives, partitioned or inaccessible drives. It can also restore files from SSD, USB flash drive, pen drive, and more storage devices.
So, try the free download of the software and restore data from unallocated hard drive. Then, proceed to fix your unallocated drive.
Steps to Recover Data from Unallocated Hard Drive:
- Connect the unallocated hard drive to a working computer and run Remo Recover software on the system. Select Recover Partitions option on the main screen.
- Next, select your unallocated hard drive and hit the Scan button. The software will deep scan the selected drive.
- Select all found partitions of the unallocated hard drive and begin Scan.
- The recovered files from the unallocated hard drive will be displayed. Preview and save restored data on another storage device.
Now, your data is successfully recovered from the unallocated hard drive. So, start fixing the drive using the below instructions.
How to Fix Unallocated Hard Drive?
Step 1: Run an effective antivirus software on your unallocated hard drive to clean up the virus or malicious scripts.
Step 2: Update Your Hard Drive Driver
- Open Device Manager from Startmenu by typing msc in Run tab or from Control Panel -> Device Manager
- Right-click on the unallocated hard drive located under Disk drive
- Select Properties -> Driverand hit Update Driver button
Step 3: Run CHKDSK
- Press Win + Rkeys together, type cmd and hit Enter (make sure you run CMD as administrator)
- Next, type in chkdsk H: /f /r /x and hit Enter (replace H with your unallocated hard disk drive letter)
Step 4: Run DiskPart Command
- Open DiskPart, type in below commands and press Enter key after each
- list volume
- select volume H(replace H with your unallocated hard disk drive letter)
- delete volume
- list volume
- select volume H
- delete volume
- delete volume override
Now, open Disk Management and right-click on your unallocated hard drive. Create a new partition and assign it a new file system.
With these steps now your hard drive should be accessible without any errors. Thought these steps doesn’t directly involve data, you need to first take backup / recover your data using Remo hard drive recovery tool and then go ahead with the troubleshooting steps. This keeps your data safe.
Senior Editor, Content Analyst and a fan of exceptional customer service. John develops and publishes instructional and informational content regarding partition management, Windows hot-fixes, data management and computer troubleshooting.
As a tenured data recovery specialist, John shares exceptional insights and blog posts about data loss and data recovery across any storage device. With 8+ years’ experience in writing for Data Recovery for both Mac OS and Windows OS computers, he is an avid learner who always wants to polish and simplify the data recovery process. John passes his free time playing Chess and reading Science Fiction novels.