I tried to apply the steps and comments from the previous answer.
It still took some work to figure it out, so I've added another answer for people after me.
The following procedure creates a local file named
file and mounts it on a local directory named
- Create a fixed size file with e.g.
which creates a file of 100 times 1000 bytes (100 kB) filled with zeroes.
dd if=/dev/zero of=file bs=1000 count=100
- Format it with the desired file system, create a directory, mount it, and get permission to use it (owner is root):
sudo mount -o loop file mounted_file/
sudo chmod -R 777 mounted_file/
-o loop parameter is optional nowadays.
- To clean up afterwards:
sudo umount mounted_file/
mkfs.ext3 -n file to see the details of the file system that will created. If desired e.g. the block size (
-b block-size) and number of inodes (
-N number-of-inodes) can be changed.
Note that we can also run out of inodes (total number of files and directories) instead of diskspace, which is usually not clearly communicated.