linux, virtualbox and centOS7 Add a new 20GB hard disk to CentOS1 in the virtual

Question

linux, virtualbox and centOS7

Add a new 20GB hard disk to CentOS1 in the virtual machine’s storage settings then do the following:

*Use fdisk to create a single LVM partition on the new 20GB hard disk.

*Setup the 20GB LVM parition as a LVM physical volume.

*Create a new volume group called vg and add the new 20GB physical volume to it.

*Create 3 new logical volumes within the volume group each 5GB in size (names: backup, data, videos).

*Format the first logical volume (backup) as ext3.

*Format the second logical volume (data) as ext4.

*Format the third logical volume (videos) as xfs.

*Create mount points for each logical volume in /mnt (/mnt/backup, /mnt/data, /mnt/videos).

*Manually use the mount command to mount each logical volume to the new directories created in /mnt.

*Add entries in /etc/fstab for the new logical volumes so that they are mounted during startup.

Explanation / Answer

ANSWER:

list the disk using below command:

#fdisk - 1

Now partition the listed disk, Consider xyz as listed disk

#fdisk/dev/xyz

use 'n' to create the partition and save the changes with 'w' command.

partition type: p (select 'p' for primary partition)

Define the size of the partition:

Last sector, +sectors or +size{K,M,G}: +20G

After partitioning use below command to verify your partition:

# fdisk -l

Creating physical Volume use below command:

# pvcreate/dev/xyz

Create volume group vg using below command:

# vgcreate testvg/dev/xyz/dev/vg

you can use below command's to display all the details of the volume group:

# vgdisplay

Now to create 3 new logical volumes within the volume group each 5GB in size (names: backup, data, videos)

# lvcreate -n backup --size 5G vg

# lvcreate -n data --size 5G vg

# lvcreate -n videos --size 5G vg

Format the first logical volume (backup) as ext3

# mkfs.ext3/dev/vg/backup

Format the second logical volume (data) as ext4

# mkfs.ext4/dev/vg/data

Format the third logical volume (videos) as xfs

# mkfs.xfs/dev/vg/videos

Mounting

# mkdir/mnt/dev/vg

# mount/dev/mnt/backup

#mkdir/mnt/dev/vg

# mount/dev/mnt/data

#mkdir/mnt/dev/vg

#mount /dev/mnt/videos

To check the mount status use below command:

$ mount

Adding entries in /etc/fstab for the new logical volumes so that they are mounted during startup add the below line in /etc/fstab

/dev/vg_ezsetupsystem40a8f02fadd0/lv_home /mnt ext3 defaults 0 0

/dev/vg_ezsetupsystem40a8f02fadd0/lv_home /mnt ext4 defaults 0 0

/dev/vg_ezsetupsystem40a8f02fadd0/lv_home /mnt xfs defaults 0 0

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