Create a partition with Fdisk under Linux

First, input fdisk-l/DEV/SDA, observe the hard disk entity use case.
Second, input FDISK/DEV/SDA, can enter the partition hard disk mode.
1. Enter m to display all the commands listed below.
2. Enter p to display the hard disk segmentation situation.
3. Enter a to set the boot area of the hard drive.
4. Enter N to set a new hard disk partition.
4.1. Enter the E-drive as the [extended] partition (extend).
4.2. Enter the P drive as [primary] partition (primary).
5. Enter T to change the drive partition properties.
6. Enter D to delete the hard drive partition properties.
7. Enter Q End does not deposit the hard disk partition attribute.
8. Enter W to end and write to disk partition properties

Instance:

(1) Enter the Fdisk interface to list all commands
#fdisk/DEV/SDA

(2) M: Show all commands used in Fdisk
Command (M for help): M

(3) P: Display hard disk partition information
Command (M for help):p
disk/dev/sda:21.5 GB, 21474836480 bytes
255 heads, Sectors/track, 2610 cylinders
Units = Cylinders of 16065 * 8225280 bytes
Sector size (logical/physical): bytes/512 bytes
I/O size (minimum/optimal): bytes/512 bytes
Disk identifier:0x0000f797

Device Boot Start End Blocks Id System
/DEV/SDA1 * 1 204800 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 287 2097152 Swap/solaris
Partition 2 does not end on cylinder boundary.
/dev/sda3 287 2611 18668544-up Linux

Description
Device boot (boot): Indicates the boot partition
Start: Indicates which cylinder a partition starts from
End: Represents the end of a section to which cylinder ends
Blocks (capacity): Indicates the partition capacity, in kilobytes
ID and System: Confirm partition Type

(4) Creating and deleting primary partitions, extended partitions, and logical partitions
Command (M for help): N
Command Action
E Extended//extended partition
P primary partition (1-4)//Primary partition
P
Selected Partition 4
There are extended partitions and primary partitions, and logical partitions are established in the extended partition. Note that 1-4 in parentheses, up to four primary partitions (including extended partitions) can be built. Build a primary partition first:

Command (M for help): N
Command Action
E Extended
P primary partition (1-4)
P #建主分区
Partition number (1-4): 1 #分区号为1
First cylinder (1-2610, default 1): #直接回车默认从第一个柱面开始划分
Using Default value 1
Last cylinder, +cylinders or +size{k,m,g} (1-2610, default 2610): +2g #加空间大小, there are a number of options: + rear units can be connected to m,g,k (remember to capitalize) to divide the space you add, It can also be a number of cylinders. Either way, you cannot exceed the remaining space on the disk otherwise it is invalid.

Command (M for help): P #分好后查看分区信息, all that has just been done at a glance.

disk/dev/sdb:21.5 GB, 21474836480 bytes
255 heads, Sectors/track, 2610 cylinders
Units = Cylinders of 16065 * 8225280 bytes
Sector size (logical/physical): bytes/512 bytes
I/O size (minimum/optimal): bytes/512 bytes
Disk identifier:0xfaa2aa49

Device Boot Start End Blocks Id System
/DEV/SDB1 1 262 2104483+ Linux

To establish an extended partition as described above:

Command (M for help): N
Command Action
E Extended
P primary partition (1-4)
E #建立扩展分区
Partition number (1-4): 4
First cylinder (263-2610, default 263):
Using Default Value 263
Last cylinder, +cylinders or +size{k,m,g} (263-2610, default 2610): +4g

Command (M for help): P

disk/dev/sdb:21.5 GB, 21474836480 bytes
255 heads, Sectors/track, 2610 cylinders
Units = Cylinders of 16065 * 8225280 bytes
Sector size (logical/physical): bytes/512 bytes
I/O size (minimum/optimal): bytes/512 bytes
Disk identifier:0xfaa2aa49

Device Boot Start End Blocks Id System
/DEV/SDB1 1 262 2104483+ Linux
/DEV/SDB4 263 785 4200997+ 5 Extended

The extended partition is built so we can create a logical partition on the extended partition.

Command (M for help): N
Command Action
L logical (5 or over)
P primary partition (1-4)
L #建逻辑分区
First cylinder (263-785, default 263):
Using Default Value 263
Last cylinder, +cylinders or +size{k,m,g} (263-785, default 785): +2g

Command (M for help): P

disk/dev/sdb:21.5 GB, 21474836480 bytes
255 heads, Sectors/track, 2610 cylinders
Units = Cylinders of 16065 * 8225280 bytes
Sector size (logical/physical): bytes/512 bytes
I/O size (minimum/optimal): bytes/512 bytes
Disk identifier:0xfaa2aa49

Device Boot Start End Blocks Id System
/DEV/SDB1 1 262 2104483+ Linux
/DEV/SDB4 263 785 4200997+ 5 Extended
/DEV/SDB5 263 524 2104483+-up Linux
The above shows that the good one primary partition has been built, a logical partition, but these are not yet valid we need to save the exit.

Command (M for help): W #保存退出
The partition table has been altered!

Calling IOCTL () to re-read partition table.
Syncing disks.

[[Email protected] Desktop]# fdisk-l

disk/dev/sda:85.9 GB, 85899345920 bytes
255 heads, Sectors/track, 10443 cylinders
Units = Cylinders of 16065 * 8225280 bytes
Sector size (logical/physical): bytes/512 bytes
I/O size (minimum/optimal): bytes/512 bytes
Disk IDENTIFIER:0X000471AD

Device Boot Start End Blocks Id System
/DEV/SDA1 * 1 204800 Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2 3851 30720000 Linux
/dev/sda3 3851 4106 2048000, Linux Swap/solaris
/DEV/SDA4 4106 10444 50912256 5 Extended
/dev/sda5 4106 10444 50911232-up Linux

disk/dev/sdb:21.5 GB, 21474836480 bytes
255 heads, Sectors/track, 2610 cylinders
Units = Cylinders of 16065 * 8225280 bytes
Sector size (logical/physical): bytes/512 bytes
I/O size (minimum/optimal): bytes/512 bytes
Disk identifier:0xfaa2aa49

Device Boot Start End Blocks Id System
/DEV/SDB1 1 262 2104483+ Linux
/DEV/SDB4 263 785 4200997+ 5 Extended
/DEV/SDB5 263 524 2104483+-up Linux

Create a partition with Fdisk under Linux