Use RAID1 and give the number of active and spare devices (2 and 0 in our case).
# In the following menu... and Continue.
# Repeat this step for every two devices until you are done. Then use "Finish" from the Mu... tem, /proc/mdstat gives you informations about md devices status. This file is not currently used by mdadm.... nten.
<code>
mdadm --create -amd --level 5 --raid-devices 3 /dev/sdb2 /dev/sdc2 /dev/sdd2
</code>
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