How to Recover Unallocated Partition Data?

Partitions are logical divisions created on a hard drive or external storage unit where the operating system stores information. Any damage to your hard drive, or virus attack or system crash might turn the partition(s) as unallocated and result in data loss. Read more to know how to recover unallocated partition data from windows.

How to recover data from unallocated partition(s) on a hard drive?

If you have lost data due to unallocated partitions, it is advisable to use a professional data recovery tool from Stellar Data Recovery or contact Stellar to recover unallocated partition data. Though the software works in most of the data loss cases, there are severe situations like physical damage to the hard drive, hardware failure, etc, which require expert services. Therefore, it is better to seek the help of professional data recovery experts in the first place as they have the technical know-how and advanced equipment at hand to recover data.

How to avail Stellar Data Recovery Services?

Stellar has been a trusted name in the world of technology. From invention to alteration, our experts have provided advanced data care services to the customers. If a partition/s becomes unallocated in a hard drive, don’t fret; professionals at Stellar have tools and techniques that can save almost every part of your data. All you have to do is follow these steps:

  1. Reach the nearest branch, or Get Free Quote
  2. Choose the preferred data recovery option – Remote Recovery or In-Lab Recovery
  3. Submit the affected hard drive–free pickup facility at your doorstep, or drop the hard drive in person at a branch. (If you choose the In-Lab recovery option)
  4. Permit the Expert to analyze the Device online. i.e., no need to ship the device. (If you choose the Remote recovery option)
  5. Wait for media analysis results (takes between three hours to one day). Media analysis results confirm the possibility of data recovery and data recovery cost
  6. Once satisfied, pay in advance and let the experts proceed with the task. The time required for data recovery varies based on the size of data, hard disk capacity, and complexity of the job.
  7. Check the recovered data, pay the outstanding amount, copy the data on a new drive.

Data Recovery Process

What are the reasons for data loss from disk partitions are:

1. Damaged Partition Table

Partition Table contains information about disk partitions on the hard drive. When the partition table goes missing, damaged, or corrupt, the disk partition(s) or the entire hard drive might become unallocated. This means you can’t access your data saved on the partition or hard drive.

2. Malware/virus attack

Virus or malware attacks can corrupt or damage the file system on a hard drive. This may sometimes result in unallocated or lost disk partitions, due to which you might lose data.

3. Partition Formatting/Deletion 

When you reinstall an operating system, you get the option to format or repartition the hard drive. You may sometimes accidentally delete or format a partition, resulting in data loss.

4. System crash

In case your system is crashed, you might get startup errors and the hard drive or disk partitions might not be detected. In such a situation, you’re unable to access your data stored on the hard drive.

5. Partition becomes RAW

Hard drive partition became RAW when it is not formatted with the file systems such as NTFS, FAT16/32, etc. If your drive partition(s) turns RAW, you couldn’t access your data stored on it.


Partition on a hard drive may become unallocated because of various reasons such as physical damage to the hard drive, drive corruption, virus attack, Partition Table corruption, and so on. It goes without saying that you lose data if a partition becomes unallocated.

Using hit-and-trial methods, to recover unallocated partition data from physically damaged, or severely corrupt drives might lead to permanent data loss. Therefore, consult a professional data recovery service provider like Stellar in the first place. Data recovery experts at Stellar use propriety tools and advanced techniques, to recover data from unallocated disk partitions or physically damaged hard drives

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