So if I've understood correctly your problem:
-when you boot, Linux checks /dev/sda9 for errors and never end...
-if you boot in emergency mode, only root partition is mounted, so it's fine but the problem is that you can't edit /etc/fstab
Well the solution is quite simple, run the e2fsck without -a option:
It should prompt you about wrong inodes... and if you want to fix/clear this. Answer yes... then reboot and pray