Have a look through these fora for 'fsck'. In my experience, it's necessary to unmount/mount the file system you're fsck-ing.

Just so you know, mmcblk0p1 is /home/user/MyDocs. This is NOT reset when you flash the FIASCO - all that does is rest the /root directory (almost all, that is). If you want to reset more, such as this corruption, you need to copy anything important from MyDocs to your pc then flash the eMMC. This makes the device go back to factory settings but it will sort out any persisting corruption.