Date: Fri, 20 Feb 2015 13:49:52 -0800 From: =?utf-8?B?WMSrY8Oy?= <xico@atelo.org> To: krad <kraduk@gmail.com> Cc: FreeBSD FS <freebsd-fs@freebsd.org> Subject: Re: ZFS root set to readonly=on temporary at boot Message-ID: <20150220214952.GA13839@coyotlan.Tlalpan> In-Reply-To: <CALfReyfgqJK5iCGJdQoAqvqL9aJ%2BWQ77hQ95QB%2BayKUJyZN7qQ@mail.gmail.com> References: <20150218191345.GA31812@coyotlan.Tlalpan> <CALfReyfgqJK5iCGJdQoAqvqL9aJ%2BWQ77hQ95QB%2BayKUJyZN7qQ@mail.gmail.com>
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On Thu, Feb 19, 2015 at 12:12:54PM +0000, krad wrote:
> Check your bootfs and the / file system actually match up. Its quite easy
> to get odd things happening if you have the bootfs set to a filesystem that
> then has an fstab which then tells / is on another fs. Also check the
> loader.conf on the bootfs. In my experiance its safer to have clean fstabs,
> and nothing in the loader.conf (in relation to this) and just relay on the
> bootfs pool property
Thanks for the tips. I still could not figure it out though. My
partition scheme is as follows:
# gpart show
=> 34 3907029101 ada0 GPT (1.8T)
34 128 1 freebsd-boot (64K)
162 8388608 2 freebsd-swap (4.0G)
8388770 3898640365 3 freebsd-zfs (1.8T)
with a bootcode installed by:
# gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ada0
The bootfs property of the zpool seems to be set to the correct root:
# zpool get bootfs zroot
NAME PROPERTY VALUE SOURCE
zroot bootfs zroot local
# zfs list zroot
NAME USED AVAIL REFER MOUNTPOINT
zroot 2.16G 1.75T 509M /
The /etc/fstab only lists the swap partition (and there are no other
fstab files, nor any unmounted snapshot/partitions):
# cat /etc/fstab
/dev/label/swap none swap sw 0 0
My loader.conf appears to be required for the server to boot:
# cat /boot/loader.conf
zfs_load="YES"
vfs.root.mountfrom="zfs:zroot"
Also, the root is mounted in read/write when manually imported from
another system:
# zpool import -R /mnt zroot
# zfs get readonly zroot
NAME PROPERTY VALUE SOURCE
zroot readonly off temporary
Anyway, it is not that huge a problem, but it is quite inconvenient not
to understand what could be the reason behind that. As far as I can
tell, it may be related to the fact that my root was not created in its
own dataset:
# zfs list
NAME USED AVAIL REFER MOUNTPOINT
zroot 2.16G 1.75T 509M /
zroot/ezjail 984M 1.75T 27K /usr/jails
zroot/var 284M 1.75T 10.6M /var
[…]
I might check that later on.
Best,
Xīcò
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