Re: bin/51230: 'gpt biosboot' needs to mark protective mbr partition as 'active'

[Robert Elz <kre%munnari.OZ.AU@localhost>]

The following reply was made to PR bin/51230; it has been noted by GNATS.

From: Robert Elz <kre%munnari.OZ.AU@localhost>
To: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: bin/51230: 'gpt biosboot' needs to mark protective mbr partition as 'active'
Date: Fri, 10 Jun 2016 00:47:53 +0700

     Date:        Thu,  9 Jun 2016 15:00:01 +0000 (UTC)
     From:        Hauke Fath <hf%spg.tu-darmstadt.de@localhost>
     Message-ID:  <20160609150001.B8DF27AAA6%mollari.NetBSD.org@localhost>
 
   |  A 'gpt recover' after dd(1)ing over the start of the disk works, so 
   |  presumably, gpt and mbr formats store their backups at the same place 
   |  near the end of the disk? 
 
 No, that's not the problem, "gpt recover" expressly refuses to do
 anything at all if the device contains a regular MBR (attempting to
 avoid accidentally wiping out valid filesystems I presume).   Since
 zapping the MBR followed by a recover works, I think it probably advisable
 to leave that protection as it is.
 
 kre