How to Create and Manage LVM on Parrot OS 3.9

To Create and Manage LVM on Parrot OS 3.9

LVM is a widely-used technique and extremely flexible disk management scheme for deploying logical rather than physical storage. With LVM, system administrator can easily resize and extend the logical drive when it is required. It is so simple to create and manage LVM on Parrot OS 3.9, and this tutorial demonstrates the same process. 

Creating Logical Volume Management 

It is very essential to add a new hardisk of any size. And for that, you need to check out the hard disks available on your machine. Run the following command for the same purpose. Add the new hard disk.

[root@linuxhelp]?[~]
 #fdisk -l
Disk /dev/sdb: 3 GiB, 3221225472 bytes, 6291456 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

Disk /dev/sda: 18 GiB, 19327352832 bytes, 37748736 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: 0x59ef32fc

Device     Boot   Start      End  Sectors  Size Id Type
/dev/sda1  *       2048   976895   974848  476M 83 Linux
/dev/sda2        976896  4882431  3905536  1.9G 82 Linux swap / Solaris
/dev/sda3       4882432 37746687 32864256 15.7G 83 Linux

And then, you need to create a new Partiton using fdisk tool. Run the following command for the same purpose. 
You need to select partition type as LVM .

[root@linuxhelp]?[~]
#fdisk /dev/sdb
Welcome to fdisk (util-linux 2.30.2).
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 0xf6c29730.

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): 1
First sector (2048-6291455, default 2048): 
Last sector, +sectors or +size{K,M,G,T,P} (2048-6291455, default 6291455): +1G

Created a new partition 1 of type ' Linux'  and of size 1 GiB.
 
Command (m for help): p
Disk /dev/sdb: 3 GiB, 3221225472 bytes, 6291456 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: 0xf6c29730

Device     Boot Start     End Sectors Size Id Type
/dev/sdb1        2048 2099199 2097152   1G 83 Linux

Command (m for help): t
Selected partition 1
Hex code (type L to list all codes): 8e
Changed type of partition ' Linux'  to ' Linux LVM' .

Command (m for help): p
Disk /dev/sdb: 3 GiB, 3221225472 bytes, 6291456 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: 0xf6c29730

Device     Boot Start     End Sectors Size Id Type
/dev/sdb1        2048 2099199 2097152   1G 8e Linux LVM

Command (m for help): w
The partition table has been altered.
Calling ioctl() to re-read partition table.
Syncing disks.

[root@linuxhelp]?[~]
#pvcreate /dev/sdb1
  Physical volume " /dev/sdb1"  successfully created.
[root@linuxhelp]?[~] 
#pvs
  PV         VG Fmt  Attr PSize PFree
  /dev/sdb1     lvm2 ---  1.00g 1.00g

[root@linuxhelp]?[~]
#pvdisplay
  " /dev/sdb1"  is a new physical volume of " 1.00 GiB" 
  --- NEW Physical volume ---
  PV Name               /dev/sdb1
  VG Name               
  PV Size               1.00 GiB
  Allocatable           NO
  PE Size               0   
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               CWNuoW-xfe6-A3DY-27oo-fXtL-nV9I-4VlWpx
   
[root@linuxhelp]?[~] 
#pvscan
  PV /dev/sdb1                      lvm2 [1.00 GiB]
  Total: 1 [1.00 GiB] / in use: 0 [0   ] / in no VG: 1 [1.00 GiB]

[root@linuxhelp]?[~]
 #vgcreate vg1 /dev/sdb1
  Volume group " vg1"  successfully created

[root@linuxhelp]?[~]
#lvcreate -n lv1 -l 100%FREE vg1
  Logical volume " lv1"  created.

??[root@linuxhelp]?[~]
???? #lvdisplay
  --- Logical volume ---
  LV Path                /dev/vg1/lv1
  LV Name                lv1
  VG Name                vg1
  LV UUID                3aT3Iz-Ap3n-e22r-XaKT-eU4B-t3kB-BjsEt3
  LV Write Access        read/write
  LV Creation host, time linuxhelp, 2017-12-05 16:49:25 +0530
  LV Status              available
  # open                 0
  LV Size                1020.00 MiB
  Current LE             255
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           254:0

[root@linuxhelp]?[~]
#mkfs.ext4 /dev/vg1/lv1
mke2fs 1.43.7 (16-Oct-2017)
Creating filesystem with 261120 4k blocks and 65280 inodes
Filesystem UUID: d348b933-25b9-4dc0-aed3-9c15095fc05a
Superblock backups stored on blocks: 
    32768, 98304, 163840, 229376

Allocating group tables: done                            
Writing inode tables: done                            
Creating journal (4096 blocks): done
Writing superblocks and filesystem accounting information: done

[root@linuxhelp]?[~]
#mkdir -p /data
[root@linuxhelp]?[~]
#mount /dev/vg1/lv1 /data/

[root@linuxhelp]?[~]
#df -h
Filesystem           Size  Used Avail Use% Mounted on
udev                 441M     0  441M   0% /dev
tmpfs                 92M  6.6M   85M   8% /run
/dev/sda3             16G   12G  3.4G  78% /
tmpfs                456M     0  456M   0% /dev/shm
tmpfs                5.0M  4.0K  5.0M   1% /run/lock
tmpfs                456M     0  456M   0% /sys/fs/cgroup
/dev/sda1            453M   48M  378M  12% /boot
tmpfs                 92M   16K   92M   1% /run/user/1000
/dev/mapper/vg1-lv1  988M  2.6M  919M   1% /data