mine looks like this and make sure to unmount before installing
mkdir -p /mnt/synoboot1
mkdir -p /mnt/synoboot2
echo 1 > /proc/sys/kernel/syno_install_flag
mount /dev/synoboot1 /mnt/synoboot1
mount /dev/synoboot2 /mnt/synoboot2
yes when using 6.2.2 it should be 0.8 standard for 918+
the cpu should support it