Win7 primary partition set to logical drive skills

Win7 system, sometimes we need to modify the primary partition to a logical drive, but many users do not understand the specific operation. The following small series will explain the skills of setting up for everyone.
The skills are as follows:
1, please enter cmd in the start bar, right click and select “ run as administrator>;

2, enter the following command
diskpart
List disk
select disk X
list partition
select partition Y
delete partition
creat paritition extended size = Z
create partition logic
list partition
select partition U
assign
At this point, the system will prompt to format this new partition, this partition will be available, then you will see a logic partition in the disk management page instead of your original primary partition.
Tips:
X refers to the serial number of the disk in your computer. If there is only one hard disk, X should be 0. If there are multiple hard disks, please select the disk where the target partition is located.
Y is the name of the target disk and should be an Arabic number.
Z is the size of the disk space, in megabytes. For example, if you want to create an 8GB disk, then Z is 8000, you enter creat paritition extended size = 8000.
U is the Arabic numeral symbol occupied by this partition displayed in the disk list after you have created a logical partition.
The above method is to quickly modify the main partition to a logical drive by command. If friends have more convenient methods, welcome to interact with Xiaobian.