What to do if after cloning a disk, there is unallocated space

When cloning one storage drive to one other, one of many necessities is that the goal drive should have the identical capability because the supply, or extra. In the occasion that the goal unit has a increased capability than the unique, when cloning is carried out (and relying on the way in which it is carried out) it is greater than doubtless that you will note that the brand new gadget already cloned has the identical capability as the unique.

Why is there unallocated space left on the brand new disk?

As we simply talked about, after cloning one disk to one other, it is doubtless that the whole lot will work with none drawback however that the brand new unit will present you a similar capability as you had within the authentic. This occurs as a result of within the cloning course of the whole lot that was on the unique disk is actually copied sector by sector to the brand new disk, together with any volumes and partitions you had.

Disk partitions

In different phrases, if for instance you are attempting to go from a 120 GB SSD to a 1 TB one, after the cloning course of when connecting the 1 TB SSD you will note that you’ve got the whole lot as you had it within the 120 GB SSD, together with the 120 GB partition because the partitions could have been cloned as properly. The identical will occur if for instance you’re cloning a 500 GB SSD in a 512 GB one, there will probably be a small a part of unallocated space that you should have to configure so as to make the most of it.

How to test for unallocated space on the gadget

You can test if you’ve gotten unallocated space on the disk very simply. In Windows, right-click on the Start button and choose “Disk Management.” At the highest you will note a record of all of the partitions you’ve gotten, whereas on the backside you will note in a extra graphic method all of your storage models and their partitions and volumes inside them. It is on this space that it is best to search for a black portion labeled “Unallocated space” or “Unallocated.”

Unallocated space

In the instance above, we’ve a 240 GB SSD wherein as you may see, there is one thing greater than 21 GB not allotted and that aren’t getting used. Fortunately, it is very straightforward to clear up this drawback so as to make the most of the utmost capability of a storage unit after cloning it, after which we’re going to let you know the steps you have to observe to repair it.

How to repair the issue

Depending on the way in which wherein the cloning was carried out, the issue could have a simple or a not really easy resolution (nevertheless it all the time has a resolution). Cloning might be carried out in a variety of methods: a literal sector-by-sector cloning (which is ultimate), a mere copy with pre-volume creation. In the primary case, the answer is so simple as accessing the identical Disk Management device, right-clicking on the principle quantity of the disk that has unallocated space and choosing “Extend quantity”.

Extend volume

Once this selection is chosen, a wizard will seem that can routinely detect the optimum choices for the amount you’ve gotten created, so you shouldn’t fear about something and click on Next till it is completed; the method solely takes a few seconds, and instantly that unallocated space will disappear and its capability could have been added to that of the principle quantity, providing you with all of the out there capability on the brand new disk to be able to use it.

However, there are instances when the choice to prolong quantity is not out there, and though you may clear up it with the DISKPART utility constructed into Windows, this may be a bit sophisticated to use for novice customers. However, we are going to let you know what you have to do to give you the option to prolong the amount with this methodology.

First click on with the fitting mouse button on the Start button and choose “Command Prompt (Administrator.” An MS-DOS window will open, wherein you should have to sort the Diskpart command.


Then sort the next command:

record quantity

An inventory will seem with all of the volumes created in your system.

Here you should be ready to acknowledge which drive has unallocated space and due to this fact you need to prolong to use its full capability. Let’s think about that on this case it is quantity 1, which is assigned the letter C and is the system’s boot disk. You would have to write the next command, altering the quantity to which the amount you need to increase is assigned.

choose quantity 1

select volume

Now simply run the next instructions; the primary is to prolong the amount and the next to exit Diskpart first after which the command immediate window.

prolong filesystem



Typically, a message will seem right here informing you that the amount has been prolonged efficiently, however you might additionally get an error saying that DiskHalf has failed to prolong the amount.


In this case, we do suggest utilizing third-party instruments to give you the option to prolong the amount and give you the option to allocate the unallocated space on the disk that you’ve got cloned.

Use third-party instruments

There are quite a few third-party software program that may make it easier to allocate this space simply and rapidly, though in a lot of them you will want to have a paid model to give you the option to do it (there are some free alternate options).

merge partitions

You have a lot to select from right here, and it will likely be up to you to choose one or the opposite relying on whether or not you want greater than allocate unallocated space on the disk or whether or not or not you need to pay. Some examples are the instruments of AOMEI, EASEUS or the well-known Partition Magic.

You even have the choice of cloning the disk once more utilizing one other methodology within the hope that a sector copy will probably be made, which is the “good one” that can enable you to simply prolong the amount as we’ve defined above.