It looks like you did it right. Unfortunately, this may not be the simple fix we were looking to leverage. The first thing to address is the message: *** /dev/mmcblk0p2 will be checked for errors at next reboot ***
I would recommend rebooting with graceful shutdown, ssh in again and try the command again. If you get the same result (1) please send the output again if any different at all (2) perform the following:
This command will show us if the hard drive is alive and available. Type: blkid | grep sda
(do not add the “1” at the end of sda this time). If the device is available, you should see: /dev/sda1: UUID=“some number representing the device uuid…” If there is no output, it means the hard drive was not detected. If there is an output, please send the output.