LVM Install Guide

Revision as of 02:24, June 4, 2014 by Rh1 (Talk | contribs)

Warning

This page is currently a work in progress 


Introduction

This tutorial will show you how to install Funtoo, including the rootfs, on logical volumes. This guide is meant to complement the regular Funtoo Installation Guide. It is recommended to open it in another tab, window ect.. and follow along with it as we will only be documenting the steps that are different or in addition to the regular guide.

Introduction to LVM

LVM (Logical Volume Management) offers a much more flexible way of managing your storage devices. Not only does it allow you to resize your volumes while the system is still up, it also frees you from having to decide exactly how many or how big volumes need to be at the time of installation.

For a detailed tour and introduction to LVM please consult the LVM Fun page.


Live CD

Please read the Live CD section in the regular guide. The only thing you need in addition to the requirements it mentions is the sys-fs/lvm2 package or equivalent. If you use System Rescue CD, it includes the lvm2 package.

Prepare Hard Disk

Preparing the hard disk for an LVM install isn't much different from a normal install except that we won't be creating a bunch of partitions as we are going to use logical volumes instead. All we need is a /boot partition, if your using gpt, you'll need the GRUB partition, and the rest of the space will just be one big partition which we'll create our logical volumes out of.

Note

We're using the previous mentioned setup to keep things simple in this guide. We are also assuming your only using one hard disk though LVM supports adding multiple hard disks and partitions to a volume group. Please adapt these instructions to suit your needs

The regular install guide does a good job explaining MRB, GPT, and gdisk/fdisk so we won't be repeating that here. Read through the Prepare Hard Disk section and create the previous mentioned partitions. If your following our setup your partition table should look like the following when completed:

GPT partition table

Command (? for help): p
Disk /dev/sda: 83886080 sectors, 40.0 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): A4E5208A-CED3-4263-BB25-7147DC426931
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 83886046
Partitions will be aligned on 2048-sector boundaries
Total free space is 2014 sectors (1007.0 KiB)

Number  Start (sector)    End (sector)  Size       Code  Name
   1            2048         1026047   500.0 MiB   8300  Linux filesystem
   2         1026048         1091583   32.0 MiB    EF02  BIOS boot partition
   3         1091584        83886046   39.5 GiB    8300  Linux filesystem

MRB partition table

Command (? for help): p

Disk /dev/sda: 42.9 GB, 42949672960 bytes, 83886080 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
Disk identifier: 0x6919e82c

   Device Boot      Start         End       Blocks   Id  System
/dev/sda1            2048     1026047       512000   83  Linux
/dev/sda2         1026048    83886079     41430016   83  Linux