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Posted 2005/06/06

Adding a new Raid device in Linux

mdadm --create --verbose /dev/md1 --level=0 --raid-devices=2 /dev/sdc1 /dev/sdd1

Test that it worked with:

mdadm --detail --scan

Add the config to mdadm.conf (requires some tweaking):

mdadm --detail --scan >> /etc/mdadm/mdadm.conf
vi /etc/mdadm/mdadm.conf
cat /etc/mdadm/mdadm.conf
DEVICE partitions
ARRAY /dev/md0 level=raid0 num-devices=2 UUID=9b0975c6:265e30aa:3b857e9d:ac800b07
   devices=/dev/sda4,/dev/sdb1
ARRAY /dev/md1 level=raid0 num-devices=2 UUID=7ef90000:c9f37c93:92767098:d3f40748
   devices=/dev/sdc1,/dev/sdd1

Make a file system:

mkfs.ext3 /dev/md1