ufs on zvol "Filesystem is not clean..."

[Andrei Kolu]

On Wednesday 05 September 2007 13:08:31 Pawel Jakub Dawidek wrote:
> On Wed, Sep 05, 2007 at 12:42:44PM +0300, Andrei Kolu wrote:
> > Hello!
> >
> > I am not sure I did everything correctly by creating UFS filesystem ontop
> > of zpool. Should I make 10GB UFS on free space or like I did on following
> > example?
> >
> > # zfs create -V 10g tank/jails/ftpjail
> > # newfs /dev/zvol/tank/ftpjail
> > # mount /dev/zvol/tank/jails/ftpjail /usr/jails/ftpjail/
> >
> > No complains from ZFS side- maybe it should say something like "You,
> > stupid! You can't do that!"
> >
> > I can create jail with ezjail:
> > # ezjail-admin create ftpjail 192.168.1.112
> > # jail /usr/jails/ftpjail ftpjail.example.com 192.168.1.112 /bin/csh
> > Everything works fine with jails so far until I reboot system....
> >
> > Sep  5 12:18:45 freebsd7 kernel: ZFS filesystem version 6
> > Sep  5 12:18:45 freebsd7 kernel: ZFS storage pool version 6
> > Sep  5 12:18:45 freebsd7 savecore: no dumps found
> > Sep  5 12:18:46 freebsd7 root: /etc/rc.d/jail: WARNING: devfs_domount():
> > Unable to mount devfs on /usr/jails/ftpjail/dev
> > Sep  5 12:18:46 freebsd7 root: /etc/rc.d/jail: WARNING: devfs_mount_jail:
> > devfs was not mounted on /usr/jails/ftpjail/dev
> > Sep  5 12:24:13 freebsd7 kernel: WARNING: R/W mount of /usr/jails/ftpjail
> > denied.  Filesystem is not clean - run fsck
>
> Have you added it to /etc/fstab?
First time I added it to fstab but system mount complained about inconsistent 
UFS filesystem. I removed it from fstab and entered single-user 
mode. "kldload zfs" and tried to fsck /dev/zvol/tank/jails/ftpjail- ZFS said 
that it can't start zvolume because other filesystem wrote something into zfs 
filesystem.

first system drive:
ad4: 152627MB <Hitachi HDS721616PLA380 P22OABEA> at ata2-master SATA300

raidz (tank):
ad6: 305245MB <Hitachi HDT725032VLA360 V54OA7EA> at ata3-master SATA300
ad8: 305245MB <Hitachi HDT725032VLA360 V54OA7EA> at ata4-master SATA300

        NAME        STATE     READ WRITE CKSUM
        tank        ONLINE       0     0     0
          raidz1    ONLINE       0     0     0
            ad6     ONLINE       0     0     0
            ad8     ONLINE       0     0     0