This
has
| GRUB_DISABLE_LINUX_UUID
|
false
|
If true, ${GRUB_DEVICE} is passed in the root parameter on the kernel command line.
If false, ${GRUB_DEVICE_UUID} is passed in the root parameter on the kernel command line when an initramfs is available. |
So it looks like i can't set root= to a UUID unless i use an initramfs - can anyone confirm?
In /usr/src/linux/admin-guide/kernel-parameters.txt it has;
root= [KNL] Root filesystem
See name_to_dev_t comment in init/do_mounts.c.
And in do_mounts.c it mentions PARTUUID= and PARTLABEL= but i dont know C so don't know what to make of it.
Background is that after adding a new disk the system doesn't boot, so i'm assuming that the /dev/sdX device names are now pointing to different hardware, so i want to fix that by using persistent names.