I have been encountering problems regarding my raspberry pi 2. I've been following the instructions given @ https://learn.adafruit.com/pi-thermal-printer/overview
when I change parameters in my
/boot/cmdline.txt and assuming that i have to disable serial-getty@ttyAMA0.service in exchange to commenting out the
I still get a boot error:
unable to mount root fs on unknown-block(179 2).
The sd card is fine, I just need to mount an image and it will run again.
I followed the instructions one by one and it seems that when I edit my
cmdline.txt and disable my getty-service (in exchange of editing
/etc/inittab) I reboot and get the error.