Henzel Moras
April 17, 2021
Disk Partition
How to
many utilities are available to partition disks , we will be using fdisk to make partitions on disk.
# list disks
[s0x45ker--_(+_+)_--SysAdmin ~]$ lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 21.3G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 20.3G 0 part
├─cl-root 253:0 0 18.3G 0 lvm /
└─cl-swap 253:1 0 2.1G 0 lvm [SWAP]
sdb 8:16 0 2G 0 disk
sr0 11:0 1 1024M 0 rom
sr1 11:1 1 1024M 0 rom
we will be using /dev/sdb in this tutorial
# using fdisk
[s0x45ker--_(+_+)_--SysAdmin ~]$ sudo fdisk /dev/sdb
Welcome to fdisk (util-linux 2.32.1).
Changes will remain in memory only, until you decide to write them.
Be careful before using the write command.
Device does not contain a recognized partition table.
Created a new DOS disklabel with disk identifier 0x5b1cda85.
# type m to list options
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
F list free unpartitioned space
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
i print information about a partition
Misc
m print this menu
u change display/entry units
x extra functionality (experts only)
Script
I load disk layout from sfdisk script file
O dump disk layout to sfdisk script file
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
Create Partitions
create 3 new primary partitions
Command (m for help): n
Partition type
p primary (0 primary, 0 extended, 4 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (1-4, default 1):
First sector (2048-4194303, default 2048):
Last sector, +sectors or +size{K,M,G,T,P} (2048-4194303, default 4194303): +256M
Created a new partition 1 of type 'Linux' and of size 256 MiB.
Command (m for help): n
Partition type
p primary (1 primary, 0 extended, 3 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (2-4, default 2):
First sector (526336-4194303, default 526336):
Last sector, +sectors or +size{K,M,G,T,P} (526336-4194303, default 4194303): +256M
Created a new partition 2 of type 'Linux' and of size 256 MiB.
Command (m for help): n
Partition type
p primary (2 primary, 0 extended, 2 free)
e extended (container for logical partitions)
Select (default p): p
Partition number (3,4, default 3):
First sector (1050624-4194303, default 1050624):
Last sector, +sectors or +size{K,M,G,T,P} (1050624-4194303, default 4194303):
Created a new partition 3 of type 'Linux' and of size 1.5 GiB.
List partition
Command (m for help): p
Disk /dev/sdb: 2 GiB, 2147483648 bytes, 4194304 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: 0x5b1cda85
Device Boot Start End Sectors Size Id Type
/dev/sdb1 2048 526335 524288 256M 83 Linux
/dev/sdb2 526336 1050623 524288 256M 83 Linux
/dev/sdb3 1050624 4194303 3143680 1.5G 83 Linux
Write to disk
confirm the settings by writting to disk
Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.
Review changes
lets check our changes
[s0x45ker--_(+_+)_--SysAdmin ~]$ lsblk | grep sdb*
sda 8:0 0 21.3G 0 disk
├─sda1 8:1 0 1G 0 part /boot
└─sda2 8:2 0 20.3G 0 part
sdb 8:16 0 2G 0 disk
├─sdb1 8:17 0 256M 0 part
├─sdb2 8:18 0 256M 0 part
└─sdb3 8:19 0 1.5G 0 part
Place a Filesystem on Disk
lets put filesystem on our newly created partitions
s0x45ker--_(+_+)_--SysAdmin ~]$ sudo mkfs.ext4 /dev/sdb1
mke2fs 1.45.6 (20-Mar-2020)
Creating filesystem with 262144 1k blocks and 65536 inodes
Filesystem UUID: 68ea7cfb-7d8d-4fb9-a40d-6c16ff282367
Superblock backups stored on blocks:
8193, 24577, 40961, 57345, 73729, 204801, 221185
Allocating group tables: done
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done
[s0x45ker--_(+_+)_--SysAdmin ~]$ sudo mkfs.ext4 /dev/sdb2
mke2fs 1.45.6 (20-Mar-2020)
Creating filesystem with 262144 1k blocks and 65536 inodes
Filesystem UUID: 0159b426-cea0-40c0-85d4-670be5da567a
Superblock backups stored on blocks:
8193, 24577, 40961, 57345, 73729, 204801, 221185
Allocating group tables: done
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: done
[s0x45ker--_(+_+)_--SysAdmin ~]$ sudo mkfs.ext4 /dev/sdb3
mke2fs 1.45.6 (20-Mar-2020)
Creating filesystem with 392960 4k blocks and 98304 inodes
Filesystem UUID: 6fbbcc36-35bf-4959-b60f-b041b3eb09d6
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912
Allocating group tables: done
Writing inode tables: done
Creating journal (8192 blocks): done
Writing superblocks and filesystem accounting information: don
Creating Mount Points
lets create mount points
[s0x45ker--_(+_+)_--SysAdmin ~]$ mkdir mnt1 mnt2 mnt3
Mount partition
lets mount them
[s0x45ker--_(+_+)_--SysAdmin ~]$ sudo mount /dev/sdb1 mnt1
[s0x45ker--_(+_+)_--SysAdmin ~]$ sudo mount /dev/sdb2 mnt2
[s0x45ker--_(+_+)_--SysAdmin ~]$ sudo mount /dev/sdb3 mnt3
Check Mount
lets check whether they were mounted
[s0x45ker--_(+_+)_--SysAdmin ~]$ df -Th | grep "mnt*"
/dev/sdb1 ext4 240M 2.1M 222M 1% /home/s0x45ker/mnt1
/dev/sdb2 ext4 240M 2.1M 222M 1% /home/s0x45ker/mnt2
/dev/sdb3 ext4 1.5G 4.5M 1.4G 1% /home/s0x45ker/mnt3
Unmount partition
unmount after using them
[s0x45ker--_(+_+)_--SysAdmin ~]$ sudo umount mnt1 mnt2 mnt3
Delete mount dir
delete the mount points
[s0x45ker--_(+_+)_--SysAdmin ~]$ rmdir mnt*
Rechcek
[s0x45ker--_(+_+)_--SysAdmin ~]$ df -Th | grep "mnt*"
[s0x45ker--_(+_+)_--SysAdmin ~]$
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