BOOT_DEGRADED=YES does actually not work in most cases because of Bug #251164 "boot impossible due to missing initramfs failure hook / event driven initramfs", see also https://wiki.ubuntu.com/ReliableRaid
BOOT_DEGRADED=YES does actually not work in most cases because of Bug #251164 "boot impossible due to missing initramfs failure hook / event driven initramfs", see also https:/ /wiki.ubuntu. com/ReliableRai d