yes, it works much faster: less secure: # mdadm --create /dev/md0 --raid-level=0 --raid-devices=3 /dev/sdb /dev/sdc /dev/sdd more secure but still efficient especially for writing: # mdadm --create /dev/md0 --raid-level=5 --raid-devices=3 /dev/sdb /dev/sdc /dev/sdd serge