Because Windows 11 only supports UEFI boot mode. Otherwise, for those people who want to install multiple OS on one MBR drive, the 4 primary partitions are really precious. If your computer supports UEFI boot mode, you can convert MBR to GPT disk for Windows 11 without data loss. Since GPT disks can have multiple primary partitions as you like, it is no big deal to have one or more extra small partitions on a GPT disk, but things will be different for MBR disks, because you can have at most 4 primary partitions on a MBR disk. Run one more time the command list volume to see the new letter assigned to the new volume.Why create partition before installing Windows 11/10/8/7?īy default, Windows will generate a system reserved partition (on MBR disk) or recovery partition (on GPT disk) and C: drive if you select an unallocated space to install Windows operating system (OS).Use the letter of your preference for the volume, for example assign letter=D. Run the command assign letter= to assign a new letter to the volume.Use the index number associated to the proper volume, for example select volume 3. Run the command select volume to select the newly labeled volume.Run the command list volume to see all volumes in the available storage devices.Use the label of your preference for the volume.
Run the command format override fs=NTFS label= to set the file system and volume label.Run the command create partition primary to create a partition of the full size of the drive.Run the command clean all to remove the partitions and data from the drive.Run the command select disk to select the desired drive. Use the index number associated to the drive, for example select disk 2.Run the command list disk to see all storage devices currently connected and recognized in the system.Open the Command Prompt as Administrator.Depending on the system, the process may take from minutes to several hours to complete.Back up your data before following these steps. This process will delete all data and partitions in the drive.
To clean the drive and create a new primary partition, follow the steps below: Note Diskpart is a Windows* CLI utility that can be used to manage the storage devices.
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