Voici comment transformer un raid 1 soft en raid 5 soft :
- On stop le raid 1 :
mdadm --stop /dev/md0
- On passe à la creation d’un raid 5 :
mdadm --create /dev/md0 --level=5 -n 2 /dev/sdb /dev/sdcmdadm: /dev/hda1 appears to contain an ext2fs file system size=1946592K mtime=Sat Apr 14 07:18:32 2007 mdadm: /dev/hda1 appears to be part of a raid array: level=1 devices=2 ctime=Sat Sep 17 16:17:45 2005 mdadm: /dev/hdb1 appears to contain an ext2fs file system size=1946592K mtime=Sat Apr 17 07:18:32 2007 mdadm: /dev/hdb1 appears to be part of a raid array: level=1 devices=2 ctime=Sat Sep 17 16:17:45 2005 Continue creating array? y mdadm: array /dev/md0 started.
- On ajoute le 3eme disque :
mdadm --add /dev/md0 /dev/sdd mdadm --grow /dev/md0 --raid-disks=3 --backup-file=/mnt/tmp/raid1-5.backup.filemdadm: Need to backup 128K of critical section .. mdadm: ... critical section passed.
- On redimensionne la partition :
e2fsck -f /dev/md0
resize2fs -p /dev/md0
Les mises à jours seront apporté sur le wiki : http://wiki.gergosnet.com/index.php/Transformer%2Bun%2Braid%2B1%2Ben%2Braid%2B5