Solved: How to label a disk in Linux

In this post we will see how to label a new disk in Linux and create a new LVM partition.

Step 1 Scan the new LUNS.

Step 2 List the available disks and identify the one you want to use.

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  fdisk -l |grep /dev/ |grep -v dm

Step 3 Use fdisk to label the disk. Here we are using disk sdb .

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LVM Crash course

In this post we will give you a crash course on Linux LVM (Logical Volume Manager). This post will cover the most used LVM commands in a Linux Admin life.

Before we start first let’s go through the concepts.

Physical Volumes (PVs): Storage devices (physical hard disks, partitions, RAID arrays etc.) provides raw storage
Volume Groups (VGs): Combine multiple PVs to create a group. They can be mirror or concatenation of PVs.
Logical Volumes (LVs): Create smaller volumes from the Volume Group(VG) as per your size requirement. You can can use the LVs to create filesystem on them.

Below commands are for RHEL 7.

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All the below commands will require root access. You can either run them with sudo  or switch to root user as mentioned below.

sudo su -

Install LVM

[root@cloudvedas ~]# yum install lvm2*

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How to add logical volume for swap in Redhat Linux

In our last post we have seen how to add a file for swap space.

In this post we will see how to add a LVM2 Logical Volume as swap.

Here we have a VG name VG1 in which we will create a volume LV1 of 1GB.

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# lvcreate VG1 -n LV1 -L 1G

Format the new swap space using mkswap:

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