Originally Posted by malekmustaq
fstab is automatically created by the system under normal booting/loading process
Installers may create it, but not normal re-boot.
As for the OP, you presumably did this to learn. What effort have you made other than relying on sysimage ?. What tools do you have available, what resources - particularly system layout ?.
Did you attempt to set up the chroot yourself ?.
What does sosreport have in it ?.