Solutions for No MBR Sector Available on Disk [2024 Best Fixes]

Master Boot Record (also called MBR

When some users try to create partitions with the Partition Wizard, they may come across an error saying "No available MBR sector on the disk." This article will help you figure out the cause of this error and resolve it.

Why is there no free MBR sector on the disk?

MBR supports hard drives or SSDs of 2 TB or less. If you have a 4 TB hard drive formatted as MBR, you can only access 2 TB of the 4 TB. You might receive an error that says "There are no available MBR partition slots on the disk" when attempting to create an MBR-formatted partition.

No available MBR slots

This could be due to two factors:

< li > The disk already has four primary partitions. < li > There is one logical partition on the disk, in addition to the three primary partitions. Therefore, you receive the error message: Unallocated space is not on the same drive as the logical partition.

Now that you know the reasons behind the “No MBR sectors available on disk” error, let's see how to fix it!

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If you're curious about MBR/GPT or logical partitions versus primary partitions, click the links to learn more details.

Solution for no MBR slots available on disk

To fix the "No available MBR sector on the disk" error, you can convert your hard drive from MBR to GPT. GPT is another partition table that breaks the limitations of MBR, allowing you to create more partitions on it. Alternatively, you can convert the primary partition to a logical one and make the logical partition contiguous.

Here are the steps to follow:

Method 1: Convert MBR to GPT without Data Loss

tools Partition Master is a comprehensive disk partition tool that allows you to convert the disk partition table from MBR to GPT without losing data.

Converting a partition table from MBR to GPT can be a cumbersome and time-consuming process, which might seem daunting to the average person. However, with the professional software called Partition Master, both experts and regular users can effortlessly switch their hard drive's partition table from MBR to GPT with just a few clicks.

It has a very user-friendly interface, and it's a great cure for any disk-related problem you might have.

Step 1: Download and launch Partition Master Tool on your computer.

Step 2. In the Disk Converter, select “Convert MBR to GPT” and click “Next” to proceed.

Step 3: Select the MBR disk that you want to convert to GPT, then click "Convert" to start the conversion.

Aside from the functions mentioned above, tools Partition Master can also convert a GPT disk to MBR disk upon your request. Whenever you run into any problem related with MBR or GPT, you can always count on tools Partition Master.

Method 2: Convert Primary Partition to Logical Partition

You can also easily convert a disk partition from primary to logical with Partition Master, just as you would converting MBR to GPT. The benefit of using Partition Master to convert primary to logical is that no volumes will be lost in the process.

As mentioned above, with its intuitive interface, it only takes a few clicks to convert a primary partition to logical drive.

Step 1. Download and run Partition Master, then go to the “Partition Manager.”

Step 2: Right-click the partition you want to convert and select "Advanced," then choose the conversion option:

1. Primary Key to Logic 2. Logic to Primary Key

Step 3: Click the "Run 1 Task" button and select "Apply" to start the conversion process.

0:00 - 0:30 will be mostly about translation from Major to logic; 0:31 - 0:50 will be about translation from logic back to Major.

After solving this problem with Partition Master, you can create partition from unallocated space. Then, I will recommend creating partition with Partition Master more efficiently and safely.

Additional tip: The best alternative to creating partitions

If you're looking for a program to create partitions, consider using the tool Partition Master. It allows you to create partitions larger than 2 TB. Let's see how it's done.

Step 1: Launch Partition Master. Right click on the unallocated space on the hard drive or external storage device from the main interface and choose “Create”.

Step 2. Adjust the size of the new partition, the file system (choose the filesystem as needed), the label, etc., and then click “OK” to continue.

Step 3. Click the Run 1 Task button and create the new partition by clicking Apply.

Watch the following video tutorial to learn how to create a partition on an NTFS, FAT, or EXT file system.

tools Partition Master is a powerful tool that allows you to perform more operations on partitions. It can create, delete, resize, and extend partitions. You can even merge non-adjacent partitions for use. Whenever you encounter any disk partition issues, you can rely on tools Partition Master to fix them.

Conclusions

So, if you see the “No MBR sectors available on disk” message, the solutions from above should work. However, if you use the Command Prompt, you will lose all the files on the disk. That's the only downside.

But obviously, you do have a choice! With just a few clicks, you can convert a partition without losing data with the help of tools Partition Master. It's a lifesaver for anyone with disk and partition-related needs, and you don't need to be tech-savvy to use it. If you encounter a problem, know the reason behind it and use tools Partition Master to fix it.

"Frequently Asked Questions About 'No MBR Partition Slots Available on Disk' Error"

Here are a few aspects of the MBR that you might want to know:

How many partition slots are there in an MBR?

The MBR supports only four primary partition slots, one of which can be an extended partition, within which you can create many more, limited partitions.

How do I create an MBR partition?

If you want to use the tools provided by Windows to create an MBR partition, it will be a long process. Instead, try using Partition Master, which can do it with just a few clicks.

< strong > How can I create more than four primary partitions on an MBR disk?

You can do this by converting primary partitions to logical ones, thus allowing more than four partitions on a disk using the MBR scheme.