Maybe you already know......
man tune2fs ; tune2fs -l <device> ; tune2fs -U time <device>
where device = some partition with an ext fs on it
(of course edit fstab with new UUID)
man tune2fs ; tune2fs -l <device> ; tune2fs -U time <device>
where device = some partition with an ext fs on it
(of course edit fstab with new UUID)

I'm booting from NVME but I want to switch back to eMMC
