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
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