[Linux-cluster] unformat gfs2

Tue Mar 18 13:38:00 UTC 2014

I have accidentally reformatted a GFS cluster.
We need to unformat it.. is there any way to recover disk ?

I read this post
http://web.archiveorange.com/archive/v/TUhSn11xEn9QxXBIZ0k6

it say that I can use gfs2_edit to recover data.
I need more details about changing block map to 0xff

tnx
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