Sorry I solve it :)

Hi there:   After I read Software-RAID.HOWTO.html, I know how to do it :)   Thank you   --- Kevin    

raid5 didn't reconstruct

Hi there:   I installed red-hat6.2 and raidtools are within it. I made a raid5:   my /etc/raidtab raiddev /dev/md0raid-level  5nr-raid-disks   3nr-spare-disks  0persistent-superblock   1chunk-size  4   parity-algorithm    left-