I have a Ubuntu 12.10 installation with (software) RAID-1 - only for data (root-system and swap are on another drive). Now I would like to add two more drives to the existing RAID 1 (basically to have RAID 1+0).
I'm pretty clueless on how to do it: how to configure/convert RAID 1 to RAID 1+0?
Also, is it possible to perform this without data loss (I suppose not)?
df -PhlT
,cat /proc/partitions
andcat /proc/mdstat
outputs!