the type to "physical volume for RAID".
# Finish this partition with "Done setting up the partitio... st disk for the second disk.
# After this, you should have at least two disks with the same partition schema and all partitions (beside swap) should be marked for RAID use.
# Now look at the... ery two devices until you are done. Then use "Finish" from the Multidisk configuration options.
# Y