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Date:      Thu, 28 Apr 2016 18:02:25 +0100
From:      Johannes Totz <johannes@jo-t.de>
To:        freebsd-stable@freebsd.org
Subject:   Re: booting from separate zfs pool
Message-ID:  <nftfn1$lka$1@ger.gmane.org>
In-Reply-To: <5721BF5C.1070201@norma.perm.ru>
References:  <5721BF5C.1070201@norma.perm.ru>

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On 28/04/2016 08:44, Eugene M. Zheganin wrote:
> Hi.
> 
> So, I'm still struggling with my problem when I cannot boot from a big
> zfs 2T pool (I have written some messages about a year ago, the whole
> story is too long and irrelevant to retell it, I'll only notice that I
> took the path where I'm about to boot from a separate zfs pool closer to
> the beginning of the disk).
> 
> I've created such a smaller pool, called it zboot. I've read pjd@ letter
> explaining that when FreeBSD sees several bootable pools, it chooses the
> first one - that's fine with me, since the new pool partition's number
> is smaller than the big one. So, I created zboot, set the mountpoint to
> legacy, wrote the content to it's /boot directory (and yes, I did call
> the 'make installkernel DESTDIR=/zboot') and rebooted. Strage thing
> happened next - I got
> 
> 
> Can't find /boot/zfsloader
> 
> FreeBSD/x86 boot
> Default: zboot:/boot/kernel/kernel
> boot:
> |
> Can't find /boot/kernel/kernel
> 
> 
> I booted back from USB stick (that I'm using to boot my machine) and
> rechecked these files - everything mentioned here is in it's place.
> 
> Does someone have the idea what I'm doing wrong ? May be this has
> something to do with the fact that zboot does contain only the /boot
> directory, and not the full rootfs ?

FWIW, I'm booting the kernel off a different pool from where the rootfs
is... I've set bootfs on the boot-pool (to point to itself), and the
loader.conf in that boot pool has vfs.root.mountfrom point to the
root-fs on the other pool.






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