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Date: Wed, 4 Jan 2012 21:43:13 +0200
From: Gareth de Vaux <bsd@lordcow.org>
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Subject: gmirror not synced
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Hi all,	I've noticed that the md5 hashes of a couple of files on
a gmirror change when I recalculate the hashes. The output usually
cycles between 2 hashes per file.

I'm guessing this is because each calculation reads the file
randomly from 1 of 2 component drives, and the files in question
had a few bit flips during their original sync. I also assume
this's something you have to live with for gmirror? Is removing
and completely rebuilding the secondary drive the only thing you
can do (which might fix these bit flips but incur others elsewhere)?