nick@fileserver:/mnt$ sudo mhddfs /mnt/hdd1,/mnt/hdd2,/mnt/hdd3,/mnt/hdd4 mnt/virtual -o allow_other
mhddfs: directory '/mnt/hdd1' added to list
mhddfs: directory '/mnt/hdd2' added to list
mhddfs: directory '/mnt/hdd3' added to list
mhddfs: directory '/mnt/hdd4' added to list
mhddfs: mount to: /mnt/mnt/virtual
mhddfs: move size limit 4294967296 bytes
fuse: bad mount point `/mnt/mnt/virtual': No such file or directory
nick@fileserver:/mnt$ cd /
nick@fileserver:/$ sudo mhddfs /mnt/hdd1,/mnt/hdd2,/mnt/hdd3,/mnt/hdd4 mnt/virtual -o allow_other
mhddfs: directory '/mnt/hdd1' added to list
mhddfs: directory '/mnt/hdd2' added to list
mhddfs: directory '/mnt/hdd3' added to list
mhddfs: directory '/mnt/hdd4' added to list
mhddfs: mount to: /mnt/virtual
mhddfs: move size limit 4294967296 bytes
nick@fileserver:/$ sudo mount -a
mount: /etc/fstab: parse error at line 14 -- ignored