zroot won't mount after 9.0-RC2 -> 9.0-RELEASE upgrade

[George Kontostanos]

On Wed, Feb 15, 2012 at 5:09 AM, Daniel Shahaf <danielsh at apache.org> wrote:
> Daniel Staal wrote on Tue, Feb 14, 2012 at 21:39:40 -0500:
>> --As of February 15, 2012 2:31:10 AM +0200, Daniel Shahaf is alleged
>> to have said:
>>
>> >One of our amd64 servers runs 9.0-RC2 (releng/9.0 at r228325) with a zfs
>> >root.
>> >
>> >It fails to boot the 9.0-RELEASE (releng/9.0 at r229305) GENERIC kernel
>> >(self compiled) with a mountfrom error:
>> >
>> >    http://people.apache.org/~danielsh/infra/loki-20120215-mountfrom.png
>> >    mountfrom> zfs:zroot
>> >    Trying to mount root from zfs:zroot []...
>> >    Mounting from zfs:zroot failed with error 2.
>> >
>> >We've tried to upgrade the zpool format 15->28; the symptoms are
>> >unchanged.  (The zroot fs is at version 4.)
>> >
>> >Why does 9.0-RC2 boot while 9.0-RELEASE (as /boot/testkernel) doesn't?
>> >What can do to boot 9.0-RELEASE from our zfs root filesystem?
>>
>> --As for the rest, it is mine.
>>
>> Did you update the bootloader?  Depending on when you installed the
>> system, it's possible your upgrading the zpool means the bootloader
>> can't read it.
>>
>
> Immediately after upgrading the zroot zpool I ran
>
>    gpart bootcode -p /boot/gptzfsboot -i 1 ${devices}
>
> as instructed in /usr/src/UPDATING.  I did not pass -b.
>
>> Daniel T. Staal

Hi could you try passing the -b switch like this:

gpart bootcode -b /boot/pmbr -p /boot/gptzfsboot -i 1 ${devices}


-- 
George Kontostanos
Aicom telecoms ltd
http://www.aisecure.net