fstab error, can't boot, can't edit fstab

Centos /Fedora OS

Fr. terminal

#  "mount -o remount,rw /"

then save and reboot

Getting to know your Hardware

Getting to know your HW of your linux box.

From terminal: Type: hdparm -I /dev/sda | grep Serial

source: http://linuxconfig.org/getting-know-a-hardware-on-your-linux-box