Date: Mon, 19 Mar 2018 09:59:14 +0700 From: Victor Sudakov <vas@mpeks.tomsk.su> To: freebsd-questions@freebsd.org Subject: Solved. Re: Dualboot and ZFS Message-ID: <20180319025914.GA57490@admin.sibptus.transneft.ru> In-Reply-To: <547e65d16ef16667f61d88463ca73079@roundcube.fjl.org.uk> References: <VI1PR02MB12007D071EA5398373D2189CF6EB0@VI1PR02MB1200.eurprd02.prod.outlook.com> <20180115125241.GB60956@admin.sibptus.transneft.ru> <VI1PR02MB1200C7F0066F361E60A6CBEDF6EB0@VI1PR02MB1200.eurprd02.prod.outlook.com> <20180115144747.GA65526@admin.sibptus.transneft.ru> <VI1PR02MB120018D174817F8FFB2981D5F6EB0@VI1PR02MB1200.eurprd02.prod.outlook.com> <20180115151526.GA66342@admin.sibptus.transneft.ru> <a7920f859b666cff48f4f73ee1b2f954@dweimer.net> <20180116034929.GB89443@admin.sibptus.transneft.ru> <20180131082738.GA46395@admin.sibptus.transneft.ru> <547e65d16ef16667f61d88463ca73079@roundcube.fjl.org.uk>
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On 2018-01-31 08:27, Victor Sudakov wrote:
> > My pool works successfully in a bhyve environment, but in VirtualBox
> > 5.0.14
> > (to test the real boot sequence) I get this message from zfsboot:
> >
> > zfsboot: No ZFS pools located, can't boot
> >
> > However, if I boot from LiveCD, the pool is there, it's healthy and
> > can be imported.
Finally, and thanks to Eugene Grossbein, the problem is solved.
The gist of the problem was the presence of a BSD label in the slice
where the bootable zfs pool was located. It turns out that zfsboot
ignores the slice if it finds a BSD label therein. The bootable zpool
should be directly on the slice (like on da1s1, and not da1s1a).
This means that both zfsboot(8) and the articles in the FreeBSD wiki
are erroneous because they all suggest "gpart create -s BSD ada0s1" -
in fact, it's fatal.
Below is the final working example:
================================================
#!/bin/sh
sysctl kern.geom.debugflags=0x10
DISK=da1
POOL="zroot-test3"
NEWSYSTEM=newsystem
SLICE=2
partition() {
gpart create -s mbr ${DISK}
gpart add -t fat32 -s 1G ${DISK}
gpart add -t freebsd -s 2G -i ${SLICE} ${DISK}
gpart set -a active -i ${SLICE} ${DISK}
}
bootcode() {
gpart bootcode -b /boot/boot0 ${DISK}
dd if=/boot/zfsboot of=/dev/${DISK}s${SLICE} count=1
dd if=/boot/zfsboot of=/dev/${DISK}s${SLICE} iseek=1 oseek=1024
}
zfscreate() {
zpool create -m none -R /${NEWSYSTEM} ${POOL} ${DISK}s${SLICE}
zfs create -o mountpoint=none ${POOL}/ROOT
zfs create -o mountpoint=/ ${POOL}/ROOT/default
zfs create -o mountpoint=/usr -o canmount=off ${POOL}/usr
zfs create -o mountpoint=/var -o canmount=off ${POOL}/var
zfs create -o mountpoint=/tmp ${POOL}/tmp
zfs create -o mountpoint=/usr/home ${POOL}/usr/home
zfs create -o mountpoint=/var/audit ${POOL}/var/audit
zfs create -o mountpoint=/var/crash ${POOL}/var/crash
zfs create -o mountpoint=/var/log ${POOL}/var/log
zfs create -o mountpoint=/var/mail ${POOL}/var/mail
zfs create -o mountpoint=/var/tmp ${POOL}/var/tmp
zfs create -V 1G -o org.freebsd:swap=on ${POOL}/swap
zpool set bootfs=${POOL}/ROOT/default ${POOL}
}
clone() {
cd /${NEWSYSTEM} || exit 3
#sleep 10
dump -0af - / | restore -ryf - || exit 3
mv etc/fstab etc/fstab.bak
echo '# empty' > etc/fstab
echo 'zfs_enable="YES"' >> etc/rc.conf.local
echo 'zfs_load="YES"' >> boot/loader.conf
cd /root
}
zfsexport() {
zpool export ${POOL}
}
partition
bootcode
zfscreate
clone
zfsexport
================================================
--
Victor Sudakov, VAS4-RIPE, VAS47-RIPN
AS43859
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