b78d570a36
The grub-mkconfig and 10_linux scripts by default attempt to use a UUID to set the root kernel command line parameter and the $root GRUB environment variable. The former can be disabled by setting the GRUB_DISABLE_LINUX_UUID variable to "true", but there is currently no way to disable the latter. The generated grub config uses the search command with the --fs-uuid option to find the device that has to be set as $root, i.e: search --no-floppy --fs-uuid --set=root ... This is usually more reliable but in some cases it may not be appropriate, so this patch introduces a new GRUB_DISABLE_UUID variable that can be used to disable searching for the $root device by filesystem UUID. When disabled, the $root device will be set to the value specified in the device.map as found by the grub-probe --target=compatibility_hint option. When setting GRUB_DISABLE_UUID=true, the GRUB_DISABLE_LINUX_UUID and GRUB_DISABLE_LINUX_PARTUUID variables will also be set to "true" unless these have been explicitly set to "false". That way, the GRUB_DISABLE_UUID variable can be used to force using the device names for both GRUB and Linux. Signed-off-by: Peter Jones <pjones@redhat.com> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com> Reviewed-by: Nicholas Vinson <nvinson234@gmail.com>
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'