e2freefrag

Print the free space fragmentation information for ext2/ext3/ext4 filesystems. More information: https://manned.org/e2freefrag.

• Check how many free blocks are present as contiguous and aligned free space:

e2freefrag /dev/sdXN

• Specify chunk size in kilobytes to print how many free chunks are available:

e2freefrag -c chunk_size_in_kb /dev/sdXN