Hi, I found that if the xfs_fsr program defrag the large files, it may cause errors. My recommend is, do not defrag the large files if the available disk space is not enough. Computer Setup (My Mini PC): 1135G7 CPU Mini PC 8GB DDR4 DRAM 500GB NVMe SSD 200GB NTFS Partition: Windows 11 200GB NTFS Partition 75GB XFS Partition: Ubuntu (GNOME) 22.04 Pastebin: ubuntu@minipc:~$ xfs_fsr -V xfs_fsr version 5.13.0 # nvme0n1p6 is XFS filesystem ubuntu@minipc:~$ sudo df -h Filesystem Size Used Avail Use% Mounted tmpfs 772M 2.3M 770M 1% /run /dev/nvme0n1p6 74G 55G 19G 75% / tmpfs 3.8G 0 3.8G 0% /dev/shm tmpfs 5.0M 4.0K 5.0M 1% /run/lock tmpfs 3.8G 0 3.8G 0% /run/qemu /dev/nvme0n1p1 256M 90M 167M 35% /boot/efi tmpfs 772M 120K 772M 1% /run/user/1000 # win10.qcow2 file size is 21GB ubuntu@minipc:~$ sudo ls -hs /var/lib/libvirt/images total 26G 2.5G debian12-1.qcow2 1.7G debian12-2.qcow2 34M win10-1.qcow2 34M win10-2.qcow2 21G win10.qcow2 595M win2003-1.qcow2 502M win2003.qcow2 # Loop and stuck ubuntu@minipc:~$ sudo xfs_fsr xfs_fsr -m /proc/mountfs -t 7200 -f /var/tmp/.fsrlast_xfs ... / start inode=151308975 / start inode=0 XFS_IOC_SWAPEXT failed: ino=117672225: Invalid argument insufficient freespace for: ino=117681809: size=21608017920: ignoring / start inode=0 XFS_IOC_SWAPEXT failed: ino=117672225: Invalid argument insufficient freespace for: ino=117681809: size=21608017920: ignoring / start inode=0 XFS_IOC_SWAPEXT failed: ino=117672225: Invalid argument insufficient freespace for: ino=117681809: size=21608017920: ignoring / start inode=0 XFS_IOC_SWAPEXT failed: ino=117672225: Invalid argument insufficient freespace for: ino=117681809: size=21608017920: ignoring / start inode=0 XFS_IOC_SWAPEXT failed: ino=117672225: Invalid argument insufficient freespace for: ino=117681809: size=21608017920: ignoring Pastebin (another Debian KVM): # vda1 is XFS filesystem debian@kvm:~$ sudo df -h Filesystem Size Used Avail Use% Mounted udev 440M 0 448M 0% /dev tmpfs 94M 656K 94M 1% /run /dev/vda1 9.3G 1.4G 7.9G 15% / tmpfs 470M 0 470M 0% /dev/shm tmpfs 5.0M 0 5.0M 0% /run/lock /dev/vda2 121M 5.9M 115M 5% /boot/efi tmpfs 94M 0 94M 0% /run/user/1000 # Normal case debian@kvm:~$ sudo xfs_fsr xfs_fsr -m /proc/mountfs -t 7200 -f /var/tmp/.fsrlast_xfs ... / start inode=0 / start inode=0 / start inode=0 / start inode=0 / start inode=0 / start inode=0 / start inode=0 / start inode=0 / start inode=0 / start inode=0 Completed all 10 passes