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

[Daniel Shahaf]

So far we've tried:

- 'gpart bootcode -b'
- load geom_part_gpt.ko
- using zpool.cache from the 9.0-RELEASE CD

And none of that seems to have had any effect.

Additional info: from the CD environment, 'zpool import' reports an old
'tank' pool on devices mfid[2-5].  (The 'zroot' pool uses mfid[0-5]p3.)

Any further ideas, please?

Thanks for all the suggestions so far.


Daniel Shahaf wrote on Wed, Feb 15, 2012 at 02:31:10 +0200:
> 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?
> 
> Thanks.
> 
> [[[
> % uname -a
> FreeBSD loki.apache.org 9.0-RC2 FreeBSD 9.0-RC2 #0: Sat Nov 12 18:35:25 UTC 2011     root at farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC  amd64
> % cat /boot/loader.conf 
> # zfs
> zfs_load="YES"
> vfs.root.mountfrom="zfs:zroot"
> 
> # 
> ipmi_load="YES"
> 
> # Console for DRAC5
> boot_multicons="YES"
> boot_serial="YES"
> comconsole_speed="57600"
> console="comconsole,vidconsole"
> hint.sio.0.flags=0
> hint.sio.1.flags=0x10
> 
> accf_http_load="YES"
> accf_data_load="YES"
> % 
> 
> ]]]