Previously, Linux used the same GUID for the data partitions as Windows (Basic data partition: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7). This created problems when dual-booting Linux and Windows in UEFI-GPT Setup, so a new GUID (Linux filesystem data: 0FC63DAF-8483-4772-8E79-3D69D8477DE4) was defined jointly by GPT fdisk and GNU Parted developers.
Signed-off-by: Patrick Delaunay patrick.delaunay73@gmail.com --- see https://en.wikipedia.org/wiki/GUID_Partition_Table#Partition_type_GUIDs and nota 9
Changes in v3: - Documentation update
Changes in v2: - None
doc/README.gpt | 3 ++- include/part_efi.h | 3 +++ 2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/doc/README.gpt b/doc/README.gpt index 59fdeeb..6e298d2 100644 --- a/doc/README.gpt +++ b/doc/README.gpt @@ -31,7 +31,8 @@ More often UUID is displayed as 32 hexadecimal digits, in 5 groups, separated by hyphens, in the form 8-4-4-4-12 for a total of 36 characters (32 digits and 4 hyphens)
-For instance, GUID of Linux data partition: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 +For instance, GUID of Basic data partition: EBD0A0A2-B9E5-4433-87C0-68B6B72699C7 +and GUID of Linux filesystem data: 0FC63DAF-8483-4772-8E79-3D69D8477DE4
Historically there are 5 methods to generate this number. The oldest one is combining machine's MAC address and timer (epoch) value. diff --git a/include/part_efi.h b/include/part_efi.h index 3012b91..c8fc873 100644 --- a/include/part_efi.h +++ b/include/part_efi.h @@ -43,6 +43,9 @@ #define PARTITION_BASIC_DATA_GUID \ EFI_GUID( 0xEBD0A0A2, 0xB9E5, 0x4433, \ 0x87, 0xC0, 0x68, 0xB6, 0xB7, 0x26, 0x99, 0xC7) +#define PARTITION_LINUX_FILE_SYSTEM_DATA_GUID \ + EFI_GUID(0x0FC63DAF, 0x8483, 0x4772, \ + 0x8E, 0x79, 0x3D, 0x69, 0xD8, 0x47, 0x7D, 0xE4) #define PARTITION_LINUX_RAID_GUID \ EFI_GUID( 0xa19d880f, 0x05fc, 0x4d3b, \ 0xa0, 0x06, 0x74, 0x3f, 0x0f, 0x84, 0x91, 0x1e)