I try to recover from mdadm raid disaster, which happened when moving from ubuntu server 10.04 to 12.04. I know the correct order of devices from dmesg log, but given this information, I still cannot access the data.

The superblocks look messy; the mdadm --examine for each disk is on this question on askubuntu

By inspecting the raw contents of backing storage, I found the beginning of my data (the LUKS container in my case) at position 0x22000 relative to the beginning of the first partition in the raid.

Question: What is the combination of options issued to "mdadm --create" to re-create mdadm that starts with the given offset? Bitmap size?

PS. The relevant information from syslog when the system was healthy are pasted here.