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| author | Mathieu Othacehe <othacehe@gnu.org> | 2020-05-29 09:05:53 +0200 |
|---|---|---|
| committer | Mathieu Othacehe <othacehe@gnu.org> | 2020-05-29 09:10:27 +0200 |
| commit | b7b45372e713a53ffa852aec1d3bfb743bb79124 (patch) | |
| tree | 31c4f17f1c09473fc22afd2ed793217ddcf40ac4 | |
| parent | 749381051d9b43fd4944b44e734c6fd9fced9030 (diff) | |
image: Add a post-MBR gap to the default image.
The generic 'efi-disk-image' needs to be bootable on systems without EFI. To
do that, GRUB is installed in the post-MBR gap. Make sure that the first
partition starts with an offset, to make this gap large enough for GRUB.
* gnu/system/image.scm (root-offset, root-label): New variables,
(esp-partition): use 'root-offset' as the partition offset,
(root-partition): use 'root-label' as the partition label.
| -rw-r--r-- | gnu/system/image.scm | 10 |
1 files changed, 9 insertions, 1 deletions
diff --git a/gnu/system/image.scm b/gnu/system/image.scm index 53f68c097d..02c026b88c 100644 --- a/gnu/system/image.scm +++ b/gnu/system/image.scm @@ -65,9 +65,17 @@ ;;; Images definitions. ;;; +;; This is the offset before the first partition. GRUB will install itself in +;; this post-MBR gap. +(define root-offset (* 512 2048)) + +;; Generic root partition label. +(define root-label "Guix_image") + (define esp-partition (partition (size (* 40 (expt 2 20))) + (offset root-offset) (label "GNU-ESP") ;cosmetic only ;; Use "vfat" here since this property is used when mounting. The actual ;; FAT-ness is based on file system size (16 in this case). @@ -78,7 +86,7 @@ (define root-partition (partition (size 'guess) - (label "Guix_image") + (label root-label) (file-system "ext4") (flags '(boot)) (initializer (gexp initialize-root-partition)))) |