Extend partition using LVM

Question

I have Ubuntu 16.04 (no desktop manager installed) running in vmware. I am out of space and am trying to extend the existing partition using LVM. I have added additional space in vmware but am having trouble adding it to ubuntu.

This is the guide I am following: Expand a Hard Disk with Ubuntu LVM.

I am stuck on the part where I need to add a physical volume. This is the command, and output im getting:

root@ubuntu:~# pvcreate /dev/sda3
Device /dev/sda3 not found (or ignored by filtering).

I can see my partitions, but can't understand why its not finding it. Here's the output of my partitions:

root@ubuntu:~# fdisk -l /dev/sda
Disk /dev/sda: 75 GiB, 80530636800 bytes, 157286400 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: 0x277beceb

Device Boot Start End Sectors Size Id Type
/dev/sda1 * 2048 999423 997376 487M 83 Linux
/dev/sda2 1001470 20969471 19968002 9.5G 5 Extended
/dev/sda3 20969472 157286399
136316928 65G 83 Linux
/dev/sda5 1001472 20969471 19968000 9.5G 8e Linux LVM

My current 10G drive is /sda5 and /sda3 is the new partition with 65 gb im trying to add to it.

This is what the filter in my lvn.conf looks like - if its commented out, this isn't the issue, right?

# global_filter = [ "a|.*/|" ]

Answer 1

When you update the partition information in a running linux system, you need to inform the operating system kernel; the usual way to do so is with partprobe

sudo /sbin/partprobe

From the partprobe(8) man page,

partprobe is a program that informs the operating system kernel of partition table changes, by requesting that the operating system re-read the partition table.