The directories /proc and /sys have inode value 1 even though it means "bad block". Both of them are functioning and I have another linux machine that in addition to these two, /boot also has inode 1.
adam@AdamMobile:/$ ls -i
1179649 bin 2 dev 25034753 home 22675457 lib 12058625 media 1 proc 10092545 sbin 12 swapfile 8912897 usr 14 vmlinuz.old
12713985 boot 15 device-clean 13 initrd.img 9961473 lib64 25165825 mnt 13500417 root 7733249 snap 1 sys 2621441 var
20578305 cdrom 23330817 etc 17 initrd.img.old 11 lost+found 1441793 opt 2 run 23592961 srv 18743297 tmp 18 vmlinuz
Why do they have inode 1?