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Date: Thu, 29 Sep 2011 08:44:53 -0600 (MDT)
From: Warren Block <wblock@wonkity.com>
To: questions@freebsd.org
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Cc: 
Subject: reverse label lookup for GPT partitions
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'gpart show -l ad4' shows GPT labels on all the ad4 partitions.  Is 
there a reverse lookup, say to find out the GPT label for ad4p4?

Yes, it can be parsed out of 'gpart show -l' output, but anything more 
direct?