Extending Root Partition on CentOS 6.5

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September 30, 2014 Linux No Comments

I updated my VPS with more memory and disk space. This is what I had to do, to use all the space on a bigger hard drive with a LVM partition.


To see the current disk usage

# df -h


To see the current partitioning

# fdisk -l


Create a new partition

# fdisk /dev/sda (Created a new 3rd partition)


List all the partitions

# fdisk -l


View current physical volumes a.k.a. pv

# pvdisplay


Allow Linux OS to use the new partition in LVM

# pvcreate /dev/sda3


See the new pv /dev/sda3

# pvdisplay


View the current volume groups

# vgdisplay


Add the new PV /dev/sda3 to the existing VG vg_centos64

# vgextend vg_centos64 /dev/sda3


# vgdisplay


View the current LV

# lvdisplay


Now make the LV larger

# lvextend -l +2559 /dev/vg_centos64/lv_root


# lvextend -l +100%FREE /dev/vg_centos64/lv_root


Now you can see the larger size of the LV

# lvdisplay


Online resize of the actual filesystem now on that LV

# resize2fs /dev/vg_centos64/lv_root


# reboot


You can see the new size now.

# df -h



See reference below for more information.


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