I foolishly rolled back my firmware so that I could install MySQL, because some tutorial told me to do so. I am usually good about not messing up that bad.
Anyway, once I rolled back my firmware, I rebooted my Pi and it only showed the rainbow splash screen for a second, then the screen turns off. I waited for the entire night and nothing happened. I Googled it, and most articles said reinstall Raspbian. I decided I needed to start over and reinstall Raspbian on the SD card, and at that point I hit the second problem. The SD is recognizable by OS X and Kali linux, but it is read-only, therefore not allowing me to use DD, gparted, fdisk, or Disk Utility to erase the SD card. I tried using
dd if=/dev/zero of=/dev/theindentifierofthesdcard bs=somenumber, regardless of what OS I was on, it still said "Permission Denied". I also tried
sudo chown -hR username /dev/SDIdentifier, yet it still didn't help.
I used this command to roll back my Pi:
sudo rpi-update f6eef32dd6388c3b04dbf462bd324d93281bf397
and I got that command from this site: http://raspipress.com/2014/06/tutorial-install-mysql-server-on-raspbian/
This SD card is 64GB and was not cheap, I refuse to purchase a new one.
My question(s) is/are this:
- Is there a way I can boot the Pi past the Splash screen and run sudo rpi-update to fix the firmware issue?
- Is there a way I can totally erase the micro SD card so I can install Raspbian again?
Specs: Raspberry Pi 2
64GB SanDisk Ultra Micro SD
Mac OS X 10.11.3
I have Windows 10 as well, but didn't try it.