Creating Software RAID
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   Redundant arrays of independent disks (RAIDs) are constructed
   from multiple storage devices that are arranged to provide
   increased performance and, in some configurations, greater
   fault tolerance. See Device, File System and RAID Types a
   description of different kinds of RAIDs.

   A RAID device is created in one step, and disks are added or
   removed as necessary. One RAID partition per physical disk is
   allowed for each device, so the number of disks available to
   the installation program determines which levels of RAID device
   are available to you. For example, if your system has two hard
   drives, the installation program will not allow you to create a
   RAID10 device, which requires 4 separate partitions.

Important

   This section only explains how to create software RAID with
   standard (physical) partitions. However, you can also configure
   LVM volume groups and Btrfs volumes to use RAID and place their
   logical volumes or Btrfs subvolumes on top of this RAID array.
   See Creating a Logical Volume Managament (LVM) Layout and
   Creating a Btrfs Layout for instructions on creating RAID in
   LVM and Btrfs.

Note

   RAID configuration options are only visible if you have
   selected two or more disks for installation. At least two disks
   are required to create a RAID device, and some RAID layouts
   will require more. Requirements for different types of RAID are
   described in Device, File System and RAID Types.

   Follow the procedure below to create software RAID:

   Procedure 1. Creating Software RAID
    1. Click the + button at the bottom of the list showing
       existing mount points. A new dialog window will open.
    2. In the new dialog window, specify a mount point for which
       you want to create a separate software RAID partition - for
       example, /. Optionally, specify a size for the new
       partition using standard units such as MB or GB (for
       example, 50GB). Then, click Add mount point to add the
       mount point and return to the main partitioning screen.

Note
       When creating a mount point for swap on software RAID,
       specify the mount point as swap.
    3. The mount point has now been created using the default
       settings, which means it has been created as an LVM logical
       volume. Select the newly created mount point in the left
       pane to configure it further, and convert it to a software
       RAID partition by changing the Device Type option to RAID.
    4. Choose a RAID type from the RAID Level drop-down menu.
       Available RAID types and their requirements are described
       in Device, File System and RAID Types.
    5. In the Device(s) section on the right side of the screen,
       you can see that the partition has been assigned to several
       physical disks. Click the Modify button to configure on
       which drives this partition will be created.
    6. In the Configure Mount Point dialog, you can specify which
       physical devices (disks) this partition may reside on. You
       can select one or more disks which will be used to hold
       this partition by holding down Ctrl and clicking each disk
       in the list. If you want to make sure that this partition
       is placed on a specific set of hard drives, select only
       those drives and unselect all others.
       After you finish configuring the partition's location,
       click Save to return to the main Manual Partitioning
       screen.
    7. Configure other settings specific to the partition - its
       Mount Point, Desired Capacity, and File System. Press
       Update Settings to apply any changes to the configuration.

   Repeat this procedure for any additional standard partitions
   with software RAID you want to create.
