diff options
Diffstat (limited to 'doc/BOOT_LOADER_SPECIFICATION.md')
| -rw-r--r-- | doc/BOOT_LOADER_SPECIFICATION.md | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/doc/BOOT_LOADER_SPECIFICATION.md b/doc/BOOT_LOADER_SPECIFICATION.md index 7d4ead96cf..f93bc08cb8 100644 --- a/doc/BOOT_LOADER_SPECIFICATION.md +++ b/doc/BOOT_LOADER_SPECIFICATION.md @@ -35,8 +35,9 @@ The EFI specification provides a boot options logic that can offer similar funct We define two directories: * `$BOOT/loader/` is the directory containing all files defined by this specification -* `$BOOT/loader/entries/` is the directory containing the drop-in snippets. This directory contains one `.conf` file for each boot menu item. -These directories are defined below the placeholder file system `$BOOT`. This placeholder file system shall be determined during _installation time_, and an fstab entry for it shall be created mounting it to /boot. The installer program should pick `$BOOT` according to the following rules: +* `$BOOT/loader/entries/` is the directory containing the drop-in snippets. This directory contains one `.conf` file for each boot menu item. + +These directories are defined below the placeholder file system `$BOOT`. This placeholder file system shall be determined during _installation time_, and an fstab entry for it shall be created mounting it to /boot. The installer program should pick `$BOOT` according to the following rules: * If the OS is installed on a disk with MBR disk label, and a partition with the MBR type id of 0xEA already exists it should be used as $BOOT. * Otherwise, if the the OS is installed on a disk with MBR disk label, a new partition with MBR type id of 0xEA shall be created, of a suitable size (let's say 500MB), and it should be used as $BOOT. @@ -44,7 +45,8 @@ These directories are defined below the placeholder file system `$BOOT`. This pl * Otherwise, if the OS is installed on a disk with GPT disk label, and an ESP partition (i.e. with the GPT type UID of c12a7328-f81f-11d2-ba4b-00a0c93ec93b) already exists and is large enough (let's say 250MB) and otherwise qualifies, it should be used as $BOOT. * Otherwise, if the OS is installed on a disk with GPT disk label, and if the ESP partition already exists but is too small, a new suitably sized (let's say 500MB) partition with GPT type GUID of bc13c2ff-59e6-4262-a352-b275fd6f7172 shall be created and it should be used as $BOOT. * Otherwise, if the OS is installed on a disk with GPT disk label, and no ESP partition exists yet, a new suitably sized (let's say 500MB) ESP should be created and should be used as $BOOT. -**Note:** _In all cases the /loader directory should be located directly in the root of the file system. Specifically, if $BOOT is the ESP, then /loader directory should be located directly in the root directory of the ESP, and not in the EFI/ subdirectory. _ + +**Note:** _In all cases the /loader directory should be located directly in the root of the file system. Specifically, if $BOOT is the ESP, then /loader directory should be located directly in the root directory of the ESP, and not in the EFI/ subdirectory._ **Note:** _`$BOOT` should be considered **shared** among all OS installations of a system. Instead of maintaining one `$BOOT` per installed OS (as `/boot` was traditionally handled), all installed OS share the same place to drop in their boot-time configuration._ |