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With automatic partitioning, you can also select the `I would like to make additional space available` option below. Use this option if you want to reclaim space from an existing partitioning layout - for example, if a disk you want to use already contains a different operating system, and you want to make this system's partitions smaller to allow more room for {PRODUCT}. The `Reclaim space` dialog which opens if this option is selected is described later in this section.
USB storage devices such as flash drives and external disks will be shown in the `Local Standard Disks` as well, and they will be available for selection the same way internal hard drives are. Make sure to *not* select any removable storage as installation targets unless you really want to do so. If you accidentally use a removable drive to install {PRODUCT} and then unplug it, your system will likely become unusable.
Unselected and Selected Disk
To control which one of your selected storage devices will contain the _boot loader_, click the `Full disk summary and bootloader` link in the bottom left corner of the screen, and follow the instructions in xref:install/Installing_Using_Anaconda.adoc#sect-installation-gui-storage-partitioning-bootloader[Boot Loader Installation]. Note that while in most cases it is sufficient to leave the boot loader in the default location, some configurations (for example, systems which require _chain loading_ from another boot loader) will require the boot drive to be specified manually.
The `Specialized & Network Disks` section below shows advanced network storage (such as iSCSI and FCoE disks) currently configured. When you first open this screen, no such devices will be displayed because they can not be automatically detected; to search for network storage devices, press `Add a disk` button and proceed with xref:Installing_Using_Anaconda.adoc#sect-installation-gui-installation-destination[Installation Destination - Specialized & Network Disks]. Any network storage you configure will then show up in the `Specialized & Network Disks` the same way local disks are shown above.
The Installation Destination screen. There are two local standard disks available
The `Installation Destination` screen allows you to configure storage options - namely, which disks will be used as the installation target for your {PRODUCT} installation. At least one disk must always be selected for the installation to proceed.
No changes to any disks will be made until you press `Begin Installation` in xref:Installing_Using_Anaconda.adoc#sect-installation-gui-installation-summary[Installation Summary]. The `Reclaim Space` dialog only *marks* partitions for resizing or deletion, but no such action is performed immediately.
`I will configure partitioning` - Select this option and press `Done` in the top left corner of the screen to configure your system's partitioning layout manually. This requires some knowledge of the theory behind disk partitions and related concepts, but gives you full control over the way the system will be installed. For instructions for manual partitioning, see xref:Installing_Using_Anaconda.adoc#sect-installation-gui-manual-partitioning[Manual Partitioning].
In the top part of the screen, all locally available storage devices (SATA, IDE and SCSI hard drives, USB flash drives, etc.) are displayed in the `Local Standard Disks` section. Local disks are detected when the installer starts - any storage devices connected after the installation has started will not be shown.
If you use the `Reclaim Space` dialog to *delete* a partition, all data on that partition will be lost. If you want to preserve your data, use the `Shrink` option, not the `Delete` option.
If you selected the `I will configure partitioning` option, pressing `Done` will open the `Manual Partitioning` screen. See xref:Installing_Using_Anaconda.adoc#sect-installation-gui-manual-partitioning[Manual Partitioning] for further instructions.
If you selected automatic partitioning and the `I would like to make additional space available`, or if there is not enough free space on your selected hard drives to install {PRODUCT}, the `Reclaim Space` dialog will appear. This dialog lists all disk devices you have configured and all partitions on those devices. The bottom right corner of the dialog displays information about how much space the system needs for at least a minimal installation and how much space you have reclaimed.
If you plan to use a disk which already contains some data - for example, if you want to shrink an existing Microsoft Windows partition and install {PRODUCT} as a second system or if you are upgrading a previous release of {PRODUCT}, make sure to back up any important data first. Manipulating partitions always carries a risk - if the process is interrupted or fails for any reason (installer error, hardware failure, power outage, etc.), any data already on the disk may become impossible to recover.
If you need to configure additional local storage devices, select `I will configure partitioning` and press `Done` to move to xref:Installing_Using_Anaconda.adoc#sect-installation-gui-manual-partitioning[Manual Partitioning]. Then, connect any new hard drives you want to make available during the installation, and press the button marked by a circular arrow in the set of controls below the list of mount points on the left side of the screen. In the dialog window that opens, press `Rescan Disks` and wait until the scanning process completes. Then, press `OK` to return to xref:install/Installing_Using_Anaconda.adoc#sect-installation-gui-storage-partitioning[Installation Destination]; all detected disks including any new ones will be displayed in the `Local Standard Disks` section.
If you lose the LUKS passphrase, any encrypted partitions and the data on them will become completely inaccessible. There is no way to recover a lost passphrase. However, if you perform a Kickstart installation, you can save encryption passphrases and create backup encryption passphrases during the installation. See xref:advanced/Kickstart_Installations.adoc#chap-kickstart-installations[Automating the Installation with Kickstart] for information about Kickstart installations.
If you chose to encrypt your hard drive, the `Disk Encryption Passphrase` dialog will appear. Enter your chosen passphrase into the `Passphrase` and `Confirm` fields. When you do so, the passphrase will be automatically evaluated and its strength will be displayed, along with suggestions on how to make it stronger if the installer has determined it to be weak. For information about creating strong passwords, see [citetitle]_{PRODUCT} Security{nbsp}Guide_.
For information about the theory and concepts behind disk partitioning in Linux, see xref:Installing_Using_Anaconda.adoc#sect-installation-gui-manual-partitioning-recommended[Recommended Partitioning Scheme].
First, review the displayed list of available storage devices. The `Reclaimable Space` column shows how much space can be reclaimed from each entry. To reclaim space, select a disk or partition, and press either the `Delete` button to delete that partition (or all partitions on a selected disk), or `Shrink` to use free space on a partition while preserving existing data. Alternatively, you can press `Delete all` in the bottom right corner; this will delete all existing partitions on all disks and make this space available to {PRODUCT}, but all existing data on all disks will be lost.
Disk selection in the Installation Destination screen. Two disks are displayed; only the one on the right side will be used