By default ext2, ext3 and ext4 reserve 5% of all space for the root user and to prevent fragmentation which can be reduced using the following command:
sudo tune2fs -m 1 /dev/sdb
This will reduce the space allocation for root to just 1 percent.
- What are the consequences of doing so?
- Am I compromising the safety of my data just for a little extra space?
- Can I make it 0% for a partition that just has media files and is rarely changed or updated?
Reference : What does the grey slice in disk usage represent?
