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After you finish configuring your system storage, press `Done` in the top left corner to save the configuration and return to the `Installation Summary` screen. At this point, the installer will check if your storage configuration is valid. If an error was detected, a message will be displayed at the bottom of the screen. Click the message to open a dialog window explaining what kind of error has been detected (for example, you put `/boot` on a Btrfs subvolume, or you did not create a BIOS Boot partition when your system requires one).
[application]*Anaconda* uses an opposite approach. First, you create all separate mount points you need, and everything needed to create them (creating a volume group, logical volumes inside it, and physical volumes where the volume group will reside) is performed automatically. You can then adjust the automatic settings as you require.
Below the list of existing mount points are two fields, showing you how much free space is left on your storage devices and how much total space they have.
Click the `+` button to add a mount point. In the dialog window that opens, choose a mount point such as `/` or `/home`, and the desired capacity for the mount point (such as `10GB` or `500MB`). Note that specifying the mount point is mandatory, but you do not have to specify the capacity at this point; this is useful when adding a mount point which you want to make larger than the current available space permits. Then, click `Add mount point` to add it to the list using the default settings, which means it will be created as a logical volume, and a new volume group will be created for it unless one already exists.
Click the `pass:attributes[{blank}]_X_ storage devices selected` to view a summary of currently selected storage devices; this may help you with orientation in more complicated storage schemas. Devices displayed here are the ones you have selected in xref:install/Installing_Using_Anaconda.adoc#sect-installation-gui-storage-partitioning[Installation Destination]. If you want to add or remove any storage devices from your configuration, return to that screen and change your selection.
For a description of available device and file system types, see xref:Installing_Using_Anaconda.adoc#sect-installation-gui-manual-partitioning-filesystems[Device, File System and RAID Types].
Here, you can choose a partitioning scheme such as `LVM` or `BTRFS` and click the `Click here to create them automatically` to prompt the installer to create a basic partitioning layout; this layout follows the guidelines described in xref:Installing_Using_Anaconda.adoc#sect-installation-gui-manual-partitioning-recommended[Recommended Partitioning Scheme]. The created layout is a basic layout where partition/volume sizes are determined automatically based on the total amount of available space.
If no error message is displayed and if you made any changes since the last time you have visited this screen, a summary dialog will appear, displaying a detailed list of the changes you made. Review the list and click `Accept Changes` to proceed with xref:Installing_Using_Anaconda.adoc#sect-installation-gui-installation-summary[Installation Summary], or click `Cancel & Return to Custom Partitioning` if you want to make any more changes.
If such a message is displayed, go back and fix any issues found by the installer; otherwise you will not be able to proceed with the installation. You can also press `Done` again to return to the `Installation Summary` anyway, but a storage configuration error will prevent you from starting the actual installation process.
In most other installers for both Linux and other operating systems, disk partitioning usually takes a "bottom-up" approach. In these installers, you first create underlying devices such as LVM physical volumes, then you create a layout such as LVM on top of them, then you create file systems on top of logical volumes, and the last step is usually assigning a mount point to each volume as needed.
Manual Partitioning
No permanent changes will be made to your disks during the actual partitioning process. The configuration you have selected will only be written to your system after you press the `Begin installation` button in xref:Installing_Using_Anaconda.adoc#sect-installation-gui-installation-summary[Installation Summary].
Rescan Disks
The exact steps for configuring your storage depend on your specific needs and your system configuration. Procedures for creating specific layouts are described further in this chapter. Before you start, you should also review xref:Installing_Using_Anaconda.adoc#sect-installation-gui-manual-partitioning-recommended[Recommended Partitioning Scheme] and xref:Installing_Using_Anaconda.adoc#sect-installation-gui-manual-partitioning-advice[Advice on Partitions] for a list of requirements and tips for partitioning your disks for {PRODUCT}.
The `Manual Partitioning` screen allows you to create a storage configuration for your {PRODUCT} system manually, giving you a greater control over your system's storage.
The Manual Partitioning screen. At this point
Then, select the newly created mount point in the list on the left side. A set of controls will display on the right side of the screen, allowing you to change its mount point, the device on which it will physically reside, its capacity, file system, etc. When you change any settings, press `Update Settings` on the bottom right. This will save the adjusted configuration; you can now create another mount point, or select a different existing one and adjust its settings as well.
The Rescan Disks dialog