Date: Mon, 8 Feb 2010 19:56:21 +0200 From: John Hay <jhay@meraka.org.za> To: Peter Steele <psteele@maxiscale.com> Cc: "freebsd-hackers@freebsd.org" <freebsd-hackers@freebsd.org> Subject: Re: How can I force boot from alternate drive with boot.config? Message-ID: <20100208175621.GA43054@zibbi.meraka.csir.co.za> In-Reply-To: <7B9397B189EB6E46A5EE7B4C8A4BB7CB383B2699@MBX03.exg5.exghost.com> References: <7B9397B189EB6E46A5EE7B4C8A4BB7CB383B2699@MBX03.exg5.exghost.com>
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On Mon, Feb 08, 2010 at 10:25:54AM -0600, Peter Steele wrote: > I've asked this on the -questions list but haven't had any feedback. I have a system configured with multiple identical drives each loaded with FreeBSD. When I was using MBR partitioning, I could create a boot.config to force the system to boot from a specific drive. For example, if I wanted to boot from the second drive, I'd create a boot.config with: > > > > 1:ad(1,a)/boot/loader > > > > We've switched to GPT partitioning and I can't seem to find a way to do this same trick. The boot loader only seems to recognize MBR partitions when it comes to this feature. I looked at the boot.c source code and there doesn't seem to be anything specifically related to GPT partitioning. I cannot for example say something like: > > > > 1:ad(1,p3)/boot/loader > > > > where p3 is the root partition in my GPT partitioned drives. So I'm puzzled: If I have a two drive system with BSD loaded on both drives and the drives are configured with GPT partitions, how can I force the system to boot from the second drive using boot.config? > I use: ad(0p3)/boot/loader John -- John Hay -- jhay@meraka.csir.co.za / jhay@FreeBSD.org
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