Merge pull request #806 from bgilbert/fat32

Revert "Revert "disk_util: use FAT32 on ESP""
coreos · Apr 13, 2018 · 2ea6fc0 · 2ea6fc0
2 parents 7c3e545 + fdf8cc2
commit 2ea6fc0
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/build_library/disk_util b/build_library/disk_util
@@ -423,6 +423,9 @@ def FormatFat(part, device):
   cmd = ['mkfs.vfat']
   if 'fs_label' in part:
     cmd += ['-n', part['fs_label']]
+  if part['type'] == 'efi':
+    # ESP is FAT32 irrespective of size
+    cmd += ['-F', '32']
   Sudo(cmd + [device, vfat_blocks], stdout_null=True)