17.2. Configuring the storage devices

Procedure

1. From the Installation Summary window, click Installation Destination. Perform the following operations in the Installation Destination window that opens:

   1. From the Local Standard Disks section, select the storage device that you require; a white check mark indicates your selection. Disks without a white check mark are not used during the installation process; they are ignored if you choose automatic partitioning, and they are not available in manual partitioning.

      The Local Standard Disks shows all locally available storage devices. For example, SATA, NVMe™ and SCSI disks, USB flash and external disks. Storage devices connected post starting the installation program are not detected, unless you follow the step 2 below. If you use a removable drive to install RHEL, your system is unusable if you remove the device.

   2. Optional: Click the Refresh link in the lower right-hand side of the window if you want to configure additional local storage devices connected after the installation program has started. The Rescan Disks dialog box opens.

      1. Click Rescan Disks and wait until the scanning process completes.

         All storage changes that you make during the installation are lost when you click Rescan Disks.

      2. Click OK to return to the Installation Destination window. All detected disks including any new ones are displayed under the Local Standard Disks section.

2. Optional: Click Add a disk…​ to add a specialized storage device.

   The Storage Device Selection window opens and lists all storage devices that the installation program has access to.

3. Optional: Under Storage Configuration, select the Automatic radio button for automatic partitioning.

   You can also configure custom partitioning. For more details, see Configuring manual partitioning.

4. Optional: Select Free up space by removing or shrinking existing partitions to reclaim space from an existing partitioning layout. For example, if a disk you want to use already has a different operating system and you want to make this system’s partitions smaller to allow more room for Red Hat Enterprise Linux.

5. Optional: Select Encrypt my data to encrypt all partitions except the ones needed to boot the system (such as /boot) by using Linux Unified Key Setup (LUKS). Encrypting your disk adds an extra layer of security.

   1. Click Done. The Disk Encryption Passphrase dialog box opens.

      1. Type your passphrase in the Passphrase and Confirm fields.

      2. Click Save Passphrase to complete disk encryption.

         警告

         If you lose the LUKS passphrase, any encrypted partitions and their data is 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.

6. Optional: Click the Full disk summary and bootloader link in the lower left-hand side of the window to select which storage device contains the boot loader. For more information, see Configuring boot loader.

   In most cases it is sufficient to leave the boot loader in the default location. Some configurations, for example, systems that require chain loading from another boot loader require the boot drive to be specified manually.

7. Click Done.

8. Optional: The Reclaim Disk Space dialog box appears if you selected automatic partitioning and the Free up space by removing or shrinking existing partitions option, or if there is not enough free space on the selected disks to install Red Hat Enterprise Linux. It lists all configured disk devices and all partitions on those devices. The dialog box displays information about the minimal disk space the system needs for an installation with the currently selected package set and how much space you have reclaimed. To start the reclaiming process:

   1. Review the displayed list of available storage devices. The Reclaimable Space column shows how much space can be reclaimed from each entry.
   2. Select a disk or partition to reclaim space.
   3. Use the Shrink button to use free space on a partition while preserving the existing data.
   4. Use the Delete button to delete that partition or all partitions on a selected disk including existing data.
   5. Use the Delete all button to delete all existing partitions on all disks including existing data and make this space available to install Red Hat Enterprise Linux.

   6. Click Reclaim space to apply the changes and return to graphical installations.

      No disk changes are made until you click Begin Installation on the Installation Summary window. The Reclaim Space dialog only marks partitions for resizing or deletion; no action is performed.

Procedure

1. From the Installation Destination window, click the Full disk summary and bootloader link. The Selected Disks dialog box opens.

   The boot loader is installed on the device of your choice, or, on a UEFI system; the EFI system partition is created on the target device and used to store the boot loader files.

2. To change the boot device, select a device from the list and click Set as Boot Device. You can set only one device as the boot device.

3. To disable a new boot loader installation, select the device currently marked for boot and click Do not install boot loader. This ensures GRUB2 is not installed on any device.

   警告

   If you choose not to install a boot loader, you cannot boot the system directly and you must use another boot method, such as a standalone commercial boot loader application. Use this option only if you have another way to boot your system.

   The boot loader may also require a special partition to be created, depending on if your system uses BIOS or UEFI firmware, or if the boot drive has a GUID Partition Table (GPT) or a Master Boot Record (MBR, also known as msdos) label. If you use automatic partitioning, the installation program creates the partition.

Procedure

1. From the Installation Summary window, click Installation Destination. The Installation Destination window opens, listing all available drives.
2. Under the Specialized & Network Disks section, click Add a disk. The storage devices selection window opens.

3. Click the Search by tab to search by port, target, LUN, or WWID.

   Searching by WWID or LUN requires additional values in the corresponding input text fields.

4. Select the option that you require from the Search drop-down menu.
5. Click Find to start the search. Each device is presented on a separate row with a corresponding check box.

6. Select the check box to enable the device that you require during the installation process.

   Later in the installation process you can choose to install Red Hat Enterprise Linux on any of the selected devices, and you can choose to mount any of the other selected devices as part of the installed system automatically. Selected devices are not automatically erased by the installation process and selecting a device does not put the data stored on the device at risk.

   注意

   You can add devices to the system after installation by modifying the /etc/fstab file.

7. Click Done to return to the Installation Destination window.

   Any storage devices that you do not select are hidden from the installation program entirely. To chain load the boot loader from a different boot loader, select all the devices present.