LVM can be configured during the graphical installation process, the
text-based installation process, or during a kickstart installation. You
can use the utilities from the lvm package to create
your own LVM configuration post-installation, but these instructions focus
on using Disk Druid during installation to
complete this task.
Creating logical volumes from the volume
groups and assign the logical volumes mount points.
Note
Although the following steps are illustrated during a GUI installation,
the same can be done during a text-based installation.
Two 9.1 GB SCSI drives (/dev/sda and
/dev/sdb) are used in the following examples. They
detail how to create a simple configuration using a single LVM volume
group with associated logical volumes during installation.
On the Disk Partitioning Setup screen, select
Automatically partition.
For Red Hat Enterprise Linux, LVM is the default method for disk partitioning. If you do
not wish to have LVM implemented, or if you require RAID partitioning,
manual disk partitioning through Disk Druid
is required.
The following properties make up the automatically created
configuration:
The /boot/ partition resides on its own non-LVM
partition. In the following example, it is the first partition on
the first drive (/dev/sda1). Bootable partitions
cannot reside on LVM logical volumes.
A single LVM volume group (VolGroup00) is
created, which spans all selected drives and all remaining space
available. In the following example, the remainder of the first
drive (/dev/sda2), and the entire second drive
(/dev/sdb1) are allocated to the volume group.
Two LVM logical volumes (LogVol00 and
LogVol01) are created from the newly created
spanned volume group. In the following example, the recommended swap
space is automatically calculated and assigned to
LogVol01, and the remainder is allocated to the
root file system, LogVol00.
Figure 8-1. Automatic LVM Configuration With Two SCSI Drives
Note
If enabling quotas are of interest to you, it may be best to modify
the automatic configuration to include other mount points, such as
/home/ or /var/, so that each file
system has its own independent quota configuration limits.
In most cases, the default automatic LVM partitioning is sufficient,
but advanced implementations could warrant modification or manual
configuration of the LVM partition tables.
Note
If you anticipate future memory upgrades, leaving some free space in
the volume group would allow for easy future expansion of the swap
space logical volume on the system; in which case, the automatic LVM
configuration should be modified to leave available space for future
growth.
