From mboxrd@z Thu Jan  1 00:00:00 1970
From: Christoph Hellwig <hch@infradead.org>
Subject: examining the layout of an existing raid device?
Date: Mon, 26 Sep 2011 06:18:24 -0400
Message-ID: <20110926101824.GA30509@infradead.org>
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Maybe I'm just stupid, but is there a way to figure out the exact
geometry (e.g. pretty print of the superblock) for an existing array
somehow?  I couldn't find anything in the mdadm man page for it.