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How to Create More Partitions on a MBR Disk without Data Loss

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    As many users know, a MBR disk can hold 4 primary partitions or 3 primary partitions and 1 extended partition at most. Well then, how to create more partitions on MBR disk under such circumstances? Here, we introduce 2 helpful tools. One is system built-in Disk Management, and the other is third-party partitioning software.

    How to Create More Partitions on MBR Disk with Disk Management


    Since Windows 2000 dynamic disk was introduced, and users can create multiple kinds of dynamic volumes, including simple volume. A simple volume is much like a partition on basic disk, but users can create unlimited simple volumes on dynamic disk. Therefore, converting basic disk to dynamic disk can make it possible to create more partitions on a MBR disk. Detailed steps are as follows:
    1. Access Windows built-in disk management tool by doing these operations: right click “Computer” icon on traditional desktop, choose “Manage”, and select “Disk Management” to get the following interface:

    convert basic disk to dynamic in disk management

    2. Right click the MBR disk and choose “Convert to Dynamic Disk” from the short-cut menu. After that, detailed wizards will show users how to complete the conversion.

    Nevertheless, once a basic disk is converted to dynamic disk, operating systems except the current one will be unbootable. Therefore, this solution is not suitable for users who are running more than one Windows on one disk.

    How to Create More Partitions on MBR Disk with Partitioning Software


    First of all, users need to download such a program. Here, we suggest using MiniTool Partition Wizard. It provides 2 solutions for creating more partitions when there have been 4 primary partitions or 3 primary partitions and 1 extended partition:
    1.3 primary partitions have existed: shrink the extended partition or one of its neighboring primary partitions to release unallocated space, and create new logical partition in this space.

    how to create more partitions on mbr disk shrink partition

    Note: a primary partition can not be among 2 logical partitions, so please shrink and create partition reasonably.

    2. There are 4 primary partitions: convert one of primary partitions except the boot one to logical, and then take operations introduced in solution 1.

    how to create more partitions on mbr disk set primary partition logical

    Now users would know how to create more partitions on a MBR disk. Please choose the best solution according to practical situations.