What parameters to mdadm, to re-create md device with payload starting at 0x22000 position on backing storage?

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 http://askubuntu.com/questions/186666/mdadm-fails-after-10-04-12-04-upgrade

By inspecting the raw contents of backing storage, I found the beginning of my data (the LUKS container in my case) starts at position 0x22000 relative to the beginning of the first partition in the raid, .i.e. /dev/sdb6.

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

The relevant information from syslog when the system was healthy are pasted here: http://pastebin.com/9KKaXXiU

P.S. This question, like the previous one, is a copy from my question on Serverfault.com: http://serverfault.com/questions/427683/what-parameters-to-mdadm-to-re-create-md-device-with-payload-starting-at-0x2200

Yours,

Adam Ryczkowski
Skype:sisteczko