It went something like this: cat /proc/mdstat sudo mdadm --stop /dev/md1 mdadm --zero-superblock /dev/sdh mdadm --zero-superblock /dev/sdj mdadm --zero-superblock /dev/sdd mdadm --zero-superblock /dev/sde mdadm --zero-superblock /dev/sdc sudo mdadm --remove /dev/md1 umount /dev/md0 fsck.ext3 /dev/md0
mdadm --add /dev/md0 /dev/sdh mdadm --add /dev/md0 /dev/sdk mdadm --add /dev/md0 /dev/sdj mdadm --add /dev/md0 /dev/sdd mdadm --add /dev/md0 /dev/sdde mdadm --add /dev/md0 /dev/sde mdadm --add /dev/md0 /dev/sdc mdadm --add missing I then tried some grow commands, before i noticed that the given version of mdadm does not support grow, so i did a: wget http://ftp.at.debian.org/debian/pool/main/m/mdadm/mdadm_3.1.4-1+8efb9d1_amd64.deb dpkg -i mdadm_3.1.4-1+8efb9d1_amd64.deb mdadm --grow /dev/md0 --level=6 --raid-devices=11 Once completed i did a: resize2fs /dev/md0 12570G After i re-mounted the device, the issue was gone. I also noticed that munin reported negative disk usage, so it appears to be a issue with mdadm/the device, and *not* df. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/717313 Title: df reports negative disk usage -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs