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