Comments on: Booting FreeBSD from a root zfs pool using a standard MBR and partition table http://www.clearchain.com/blog/posts/booting-freebsd-from-a-root-zfs-pool-using-a-standard-mbr-and-partition-table -= Daily Happenings =- Thu, 01 Jul 2010 01:28:03 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Henri Hennebert http://www.clearchain.com/blog/posts/booting-freebsd-from-a-root-zfs-pool-using-a-standard-mbr-and-partition-table/comment-page-1#comment-120 Henri Hennebert Thu, 25 Jun 2009 13:37:35 +0000 http://www.clearchain.com/blog/?p=366#comment-120 Correction to my previous post: I don't no why, the previous solution work only once. Or maybe I dream it work ... The loader can't be loader from a slice other than with the sysid 0xa5. So I just put a bsdlabel on ad0s2 with ad0s1a starting at 0 and extending over the complete slice (so part a == part c) and put the zfsboot on ad0s2a and create the pool on ad0s2a. Everything really run smoothly now. Henri Correction to my previous post:

I don’t no why, the previous solution work only once. Or maybe I dream it work …

The loader can’t be loader from a slice other than with the sysid 0xa5.

So I just put a bsdlabel on ad0s2 with ad0s1a starting at 0 and extending over the complete slice (so part a == part c) and put the zfsboot on ad0s2a and create the pool on ad0s2a.

Everything really run smoothly now.

Henri

]]> By: Henri Hennebert http://www.clearchain.com/blog/posts/booting-freebsd-from-a-root-zfs-pool-using-a-standard-mbr-and-partition-table/comment-page-1#comment-119 Henri Hennebert Thu, 25 Jun 2009 10:10:45 +0000 http://www.clearchain.com/blog/?p=366#comment-119 Now your problem is solved. With 7.2-STABLE after r193696 with a patch on /usr/src/lib/libstand/nfs.c (see post http://docs.freebsd.org/cgi/getmsg.cgi?fetch=589861+0+archive/2009/freebsd-stable/20090607.freebsd-stable - note the patch of SOPEN_MAX is now in stable). I put my pool on ad0s2 and set this partition active. The boot run smoothly ONLY IF the partition type (sysid) is NOT 0xa5 (FreeBSD/NetBSD/386BSD). I use fdisk to set sysid to 0x82 (Linux swap or Solaris x86) just to make a tribute to sun! If the sysid is 0xa5 /usr/src/sys/boot/i386/libi386/biosdisk.c try to bee too smart... Henri Now your problem is solved.

With 7.2-STABLE after r193696 with a patch on /usr/src/lib/libstand/nfs.c (see post http://docs.freebsd.org/cgi/getmsg.cgi?fetch=589861+0+archive/2009/freebsd-stable/20090607.freebsd-stable – note the patch of SOPEN_MAX is now in stable).

I put my pool on ad0s2 and set this partition active.

The boot run smoothly ONLY IF the partition type (sysid) is NOT 0xa5 (FreeBSD/NetBSD/386BSD). I use fdisk to set sysid to 0×82 (Linux swap or Solaris x86) just to make a tribute to sun!

If the sysid is 0xa5 /usr/src/sys/boot/i386/libi386/biosdisk.c try to bee too smart…

Henri

]]> By: dante http://www.clearchain.com/blog/posts/booting-freebsd-from-a-root-zfs-pool-using-a-standard-mbr-and-partition-table/comment-page-1#comment-117 dante Fri, 05 Jun 2009 23:07:22 +0000 http://www.clearchain.com/blog/?p=366#comment-117 you forgot to put a "kldload ./geom_mbr.ko" at the beginning. Without it you can't read mbr partition table ! you forgot to put a “kldload ./geom_mbr.ko” at the beginning. Without it you can’t read mbr partition table !

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