Partition creation is set interactively from the following command.

Creating a partition.

$ sudo fdisk /dev/xvdc

###Enter the key when the following is displayed. You can see help with m to see what keys are available
Command (m for help):m

Help:

  DOS (MBR)
   a   toggle a bootable flag
   b   edit nested BSD disklabel
   c   toggle the dos compatibility flag

  Generic
   d   delete a partition
   l   list known partition types
   n   add a new partition
   p   print the partition table
   t   change a partition type
   v   verify the partition table

  Misc
   m   print this menu
   u   change display/entry units
   x   extra functionality (experts only)

  Save & Exit
   w   write table to disk and exit
   q   quit without saving changes

  Create a new label
   g   create a new empty GPT partition table
   G   create a new empty SGI (IRIX) partition table
   o   create a new empty DOS partition table
   s   create a new empty Sun partition table


###Display partition information before setting
Command (m for help): p					
	Disk /dev/xvdc: 100 GiB, 107374182400 bytes, 209715200 sectors				
	Units: sectors of 1 * 512 = 512 bytes				
	Sector size (logical/physical): 512 bytes / 512 bytes				
	I/O size (minimum/optimal): 512 bytes / 512 bytes				
	Disklabel type: dos				
	Disk identifier: 0x144852f7	

###Creating a partition( n   add a new partition )
Command (m for help): n					
	Partition type				
	   p   primary (0 primary, 0 extended, 4 free)				
	   e   extended (container for logical partitions)

###Select partition type(This time the default primary)
Select (default p): p

###Select the number of partitions(Leave default Enter)
Partition number (1-4, default 1): 

###Size setting(Leave default Enter)
First sector (2048-209715199, default 2048):
Last sector, +sectors or +size{K,M,G,T,P} (2048-209715199, default 209715199): 		
		

###Check partition information
Command (m for help): p					
	Disk /dev/xvdc: 100 GiB, 107374182400 bytes, 209715200 sectors				
	Units: sectors of 1 * 512 = 512 bytes				
	Sector size (logical/physical): 512 bytes / 512 bytes				
	I/O size (minimum/optimal): 512 bytes / 512 bytes				
	Disklabel type: dos				
	Disk identifier: 0x144852f7				
					
	Device     Boot     Start       End Sectors  Size Id Type				
	/dev/xvdc1      209715199 209715199       1  512B 83 Linux											
###End
Command (m for help): q

You have now created a partition that uses the additional disk in one area.

Format (logical)

Then format it and apply the file system on the partition. This is called a logical format. The format for using a storage medium as a storage medium is called a physical format, but it is different.

The logical format rewrites the file system management information instead of erasing the data.

Logical format.

$ mkfs -t ext4 /dev/xvdc1		

** Shobon-kun: ** </ font color> (´ ･ ω ･ `)" You are ready to use the added disk as a file system. 』\

$ sudo mount /dev/xvdc1 /mnt --types=ext4 --option=rw

$ df -hT
<font color="DeepSkyBlue">**Shobon-kun:(´ ･ ω ･`)**</font color>"Additional disks can now be used as a file system! 』\

Will mount even after reboot/etc/Add to fstab.


#### **`Persistent mount.`**

Example of how to write fstab
!["Beginners add disks on Linux_´ ･ ω ･`_Edit_-_Qiita.png](https://qiita-image-store.s3.ap-northeast-1.amazonaws.com/0/147613/9c99b1ed-4a5a-5806-f22d-32a0dfb8585b.png)

<font color="DeepSkyBlue">**Shobon-kun:**</font color>(´ ･ ω ･`)"I wasn't aware of it until now, but I feel like I can be aware of which partition I'm using now."


With this disk addition, we separated partitions, formatted and mounted them in one physical device. Another option is to think of multiple devices as a single volume, separate them, and mount them.

#LVM(logical volume manager)




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