While modifying the SCH-i909 ROM, I extracted the firmware and found weird
.rfs files instead of the usual
.img files. What is this?
Google unfortunately had no answer. Moreover, I could NOT, for the life of me, figure out how to create an
.rfs file for the new firmware. Until I discovered this tutorial on XDA.
Step 1: Create a temporary directory.
Step 2: Mount the .rfs file itself.
sudo mount -o loop <filename>.rfs temp/
Step 3: Profit.
I still haven’t managed out how to create these .rfs files, but this is a good workaround.
To unmount after changes have been made, issue:
sudo umount temp/