By AOMEI / Last Updated September 11, 2019

About Primary Partition and Logical Partition

You can store your data on a hard disk only when you have partitioned the hard drive in Windows 10. There are different types of partitions such as primary partition, logical partition and they are different from each other.

Primary partition

Primary partition is where operating system can be installed. Only the system is installed on primary partition, can it boot normally. And the primary partition where you install operating system will be marked as active partition which is used for initial booting. Each primary partition has its own boot block.

Logical Partition

The number of logical partitions on a hard drive depends on the type of the disk. There are 2 disk types: MBR and GPT. As for MBR disk, you are only allowed to create 4 primary partitions or 3 primary partitions plus 1 extend partition. The extend partition isn’t to store data, but to create unlimited logical partitions. After creating partition, you can store data on logical drive just like primary partition.

Why Need to Convert Primary to Logical in Windows 10?

As mentioned above, MBR disk only supports 4 primary partitions or 3 primary partitions plus 1 extended partition. If there have been 4 primary partitions on your MBR disk, you can’t create other new partition due to the limitation of MBR. But you hope to more partitions to store your data separately from other data, at this moment, you need to convert to logical partition.

Although Windows 10 has been improved most compared with the early version, it still doesn’t allow you to convert primary to logical with Disk Management or DiskPart. What can you do to solve the problem?

Convert Primary to Logical in Windows 10 with AOMEI Partition Assistant Professional

AOMEI Partition Assistant Professional is a third-party software devoted to partition management. It allows you to convert primary drive to logical in Windows 10 easily. Besides this feature, it can also help you allocate free space, migrate OS to SSD, make conversion between MBR and GPT The following will show you the detail steps of how to convert primary partition to logical partition in Windows 10?

Step1: Install and launch the software. Right click the partition you need to convert (eg. partition D) and then choose “Advanced” and then select “Convert to Logical.”

Convert To Logical

Step2: Click OK to continue.

Click Ok

Step3: Click Apply to perform the operation.

Apply Proceed


  • Convert primary partition to logical is mainly used on basic MBR disk.

  • You’re not allowed to convert a boot partition to logical. Otherwise, you computer will likely to stop working.

  • The location and the size of the primary partition will be slightly changed after converting since the logical partition is 63 sectors bigger than primary partition.