kern/155484: GPT + UFS boot

[Alexander Best]

The following reply was made to PR kern/155484; it has been noted by GNATS.

From: Alexander Best <arundel at freebsd.org>
To: Andrey Vladimirov <rarehawk at gmail.com>
Cc: freebsd-gnats-submit at FreeBSD.org
Subject: Re: kern/155484: GPT + UFS boot
Date: Sat, 12 Mar 2011 08:22:30 +0000

 On Fri Mar 11 11, Andrey Vladimirov wrote:
 > 
 > >Number:         155484
 > >Category:       kern
 > >Synopsis:       GPT + UFS boot
 > >Confidential:   no
 > >Severity:       serious
 > >Priority:       medium
 > >Responsible:    freebsd-bugs
 > >State:          open
 > >Quarter:        
 > >Keywords:       
 > >Date-Required:
 > >Class:          sw-bug
 > >Submitter-Id:   current-users
 > >Arrival-Date:   Fri Mar 11 22:50:10 UTC 2011
 > >Closed-Date:
 > >Last-Modified:
 > >Originator:     Andrey Vladimirov
 > >Release:        Freebsd 8.2 RELEASE
 > >Organization:
 > >Environment:
 > FreeBSD  8.2-STABLE FreeBSD 8.2-STABLE #0: Wed Mar  9 20:11:11 UTC 2011     andrey@:/usr/obj/usr/src/sys/x3650m2  amd64
 > >Description:
 > I'm trying to setup a system with a large RAID array (total ~4TB)
 > I do next step:
 > 1.Create the boot, swap and UFS partitions:
 >  Fixit# gpart add -s 64K -t freebsd-boot mfid0
 >  Fixit# gpart add -s 8G -t freebsd-swap -l swap0 mfid0
 >  Fixit# gpart add -t freebsd-ufs -l disk0 mfid0
 > 2. Install the Protected MBR (pmbr) and gptboot loader 
 > Fixit# gpart bootcode -b /mnt2/boot/pmbr -p /mnt2/boot/gptzfsboot -i 1 ad0
 > Then install FreeBSD and add this:
 > echo 'vfs.root.mountfrom="ufs:/dev/mfid0p2"' >> /boot/loader.conf
 
 isn't this line pointing to your swap partition?
 
 try echo 'vfs.root.mountfrom="ufs:/dev/mfid0p3"' >> /boot/loader.conf
 
 ...also shouldn't this be:
 
 gpart bootcode -b /mnt2/boot/pmbr -p /mnt2/boot/gptboot -i 1 mfid0 ?
 
 also i'm not sure -b and -p can be used together in one command. at least the
 gpart(8) manual uses two commands for it.
 
 > After rebooting (system not booting) i see message:
 > is unable to find loader at /boot/loader or can it load /boot/kernel/kernel
 > 
 > I load from DVD and go to Fixit
 > Copying /boot/loader to /loader allows me to enter /loader at the "boot:" prompt and the loader will load, however, its unable to load the kernel.
 > 
 > If I do an "ls" at the loader prompt I can see boot listed as a directory (with a "d" before it)
 > Trying to do "ls boot" inexplicably it says "boot: not a directory"
 > 
 > 
 > 
 > 
 > 
 > >How-To-Repeat:
 > do next step:
 > 1.Create the boot, swap and UFS partitions:
 >  Fixit# gpart add -s 64K -t freebsd-boot mfid0
 >  Fixit# gpart add -s 8G -t freebsd-swap -l swap0 mfid0
 >  Fixit# gpart add -t freebsd-ufs -l disk0 mfid0
 > 2. Install the Protected MBR (pmbr) and gptboot loader 
 > Fixit# gpart bootcode -b /mnt2/boot/pmbr -p /mnt2/boot/gptzfsboot -i 1 ad0
 > echo 'vfs.root.mountfrom="ufs:/dev/mfid0p2"' >> /boot/loader.conf
 > 
 > >Fix:
 > If do next step:
 >  Fixit# gpart add -s 64K -t freebsd-boot mfid0
 >  Fixit# gpart add -s 3800G -t freebsd-ufs -l disk0 mfid0
 >  Fixit# gpart add -s 8G -t freebsd-swap -l swap0 mfid0
 > or
 >  Fixit# gpart add -s 64K -t freebsd-boot mfid0
 > next partition must be root(/) 
 >  Fixit# gpart add -s 3G -t freebsd-ufs -l disk0 mfid0  
 >  Fixit# gpart add -s 8G -t freebsd-swap -l swap0 mfid0
 > 
 > No problem with boot on GPT.
 > 
 > >Release-Note:
 > >Audit-Trail:
 > >Unformatted:
 
 -- 
 a13x