FS defragment

xfs

reference: url

check

# xfs_db -r /dev/sda5 xfs_db> frag actual 22222222, ideal 2342342, fragmentation factor 99.9% xfs_db> quit

defragment

# xfs_fsr -v /dev/sda5

ext4

reference: url

check

e2freefrag

defragment

e2defrag

並不是官方版本