Extend disk space on Linux on Virtual Machine

Now that you have extended the disk space from VMWare ESXi. Lets check into the OS level and extend it from the OS level.

 

here is an example using Linux Virtual Machine (VM)

 

list all the disks available on the target Linux VM so we can identify which one’s extended

lsblk

 

once you’ve identified the target disk, you can have system rescan the disk

*sda can be changed to your target disk name

echo 1 > /sys/class/block/sda/device/rescan

 

use below command to make sure the device size is changed successfully

dmesg

 

Run command parted and resize partition to use new free space

*note that sda can be changed to your target disk name

 

# parted /dev/sda

GNU Parted 3.4

Using /dev/sda

Welcome to GNU Parted! Type ‘help’ to view a list of commands.

(parted)

(parted) print

Model: VMware Virtual disk (scsi)

Disk /dev/sda: 365GB

Sector size (logical/physical): 512B/512B

Partition Table: msdos

Disk Flags:

 

Number  Start   End     Size    Type     File system  Flags

 1      1049kB  1075MB  1074MB  primary  xfs          boot

 2      1075MB  258GB   257GB   primary               lvm

 

Use command resizepart inside parted to resize existing partition

(parted) resizepart

Partition number? 2

End?  [258GB]? 365GB

 

Use command print inside parted to list current partition table (note that p is short for print)

(parted) p

Model: VMware Virtual disk (scsi)

Disk /dev/sda: 365GB

Sector size (logical/physical): 512B/512B

Partition Table: msdos

Disk Flags:

 

Number  Start   End     Size    Type     File system  Flags

 1      1049kB  1075MB  1074MB  primary  xfs          boot

 2      1075MB  365GB   364GB   primary               lvm

 

Use command quit inside parted to exit to bash CLI

(parted) quit

Information: You may need to update /etc/fstab.

 

force the kernel to re-read partition table from sda

# partprobe /dev/sda

 

It is optional but you can force to re-read all the partitions in the system (usefull if you particularly created a new disk/partition)

# pvscan 

# partx -v -a /dev/sda   

 

We can now see the change and increase the size of LVM PV (the disk you just resize)

# pvresize /dev/sda2

 

You will now see free space in VG, that you can use as you wish.

 

 

Here’s other helpful tips if you want to create new logical volume after extending disk space

# pvresize /dev/sda#

# pvscan

# lvcreate -n “nameOfVolume” -L “sizeInG” “volumeGroupName”

# lvscan

# mkfs.xfs “nameOfVolume”

# mount -t xfs “nameOfVolume” “pathToMount”

# vi /etc/fstab