Date: Mon, 5 Sep 2011 21:54:58 +0200 From: Jeremie Le Hen <jeremie@le-hen.org> To: freebsd-fs@FreeBSD.org Cc: jeremie@le-hen.org Subject: Difficulties to use ZFS root: ROOT MOUNT ERROR Message-ID: <20110905195458.GA7863@felucia.tataz.chchile.org>
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Hi list,
I've followed the instructions documented here:
http://wiki.freebsd.org/RootOnZFS/ZFSBootPartition
The kernel starts correctly so this rules out any problem regarding
boot0, zfsboot and ZFS loader.
But when the kernel tries to mount the root filesystem, it fails with
the following output:
% Trying to mount root from zfs:zroot
% ROOT MOUNT ERROR:
% If you have invalid mount options, reboot, and first try the following from
% the loader prompt:
%
% set vfs.root.mountfrom.options=rw
%
% and then remove the invalid mount options from /etc/fstab.
%
% Loader variables:
% vfs.root.mountfrom=zfs:zroot
% vfs.root.mountfrom.options=rw
>From a netboot'd FreeBSD:
# zfs import zroot
% # zpool get bootfs zroot
% NAME PROPERTY VALUE SOURCE
% zroot bootfs zroot local
%
% # zfs list -o name,canmount,mountpoint
% NAME CANMOUNT MOUNTPOINT
% zroot on legacy
% zroot/tmp on /tmp
% zroot/usr on /usr
% zroot/usr/home on /usr/home
% zroot/usr/ports on /usr/ports
% zroot/usr/ports/distfiles on /usr/ports/distfiles
% zroot/usr/ports/packages on /usr/ports/packages
% zroot/usr/src on /usr/src
% zroot/usr/src8 on /usr/src8
% zroot/var on /var
% zroot/var/crash on /var/crash
% zroot/var/db on /var/db
% zroot/var/db/pkg on /var/db/pkg
% zroot/var/empty on /var/empty
% zroot/var/log on /var/log
% zroot/var/mail on /var/mail
% zroot/var/run on /var/run
% zroot/var/tmp on /var/tmp
% # zfs export zroot
/boot/zfs/zpool.cache exists in the zroot filesystem:
% # zpool import -R /mnt zroot
% # zfs set mountpoint=/ zroot
% # ls -l /mnt/boot/zfs/zpool.cache
% -rw-r--r-- 1 root wheel 924 Sep 5 07:31 /mnt/boot/zfs/zpool.cache
% # grep zfs /mnt/boot/loader.conf /mnt/etc/rc.conf
% /mnt/boot/loader.conf:zfs_load="YES"
% /mnt/boot/loader.conf:vfs.root.mountfrom="zfs:zroot"
% /mnt/etc/rc.conf:zfs_enable="YES"
Any idea why this error occurs?
Thanks
--
Jeremie Le Hen
Men are born free and equal. Later on, they're on their own.
Jean Yanne
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