aggregate_hd is a file system based on FUSE. It aggregates several harddrives
on one single mount pount. Thus you can use several old disks to create one
bigger disk.

aggregate_hd works at the filesystem level. It spreads files on the differents
drives. In case of a disk crash, only data stored on that disk are lost.

File spreading over the different disks is done using the available space and
a random value. 

Directory are created on every disk.

make install

aggregate_hd /mnt -o dirs=/data01:/data02:/data03:/data04:/data05:/data06