(In reply to Neil Brown from comment #2) > Can you please show me the "mdadm -E" output. In the meantime I had repaired the images of the RAID legs (the RAID assembled OK), so probably the output won't help you much. In fact the new disks had a size that was too small to hold all the data of the original disks. Currently the output line you are interested in reads (copied by hand, so spacing may be incorrect): Unused Space: before=133040 sectors, after=0 sectors