Booting from ZFS raidz

[Arnaud Houdelette]

Stefan Bethke a écrit :
> Am 16.07.2009 um 14:06 schrieb Stefan Bethke:
>
>> Am 12.07.2009 um 09:06 schrieb Jonathan Noack:
>>
>>> Anyone know how I should proceed?  I'm really frustrated that I haven't
>>> been able to get this working.
>>
>> Me too. I just decided to revisit this, and unfortunatly, I'm still 
>> stuck with the loader having trouble reading blocks off the raidz1 
>> volume.  I've updated the creation script (see below).  This is on 
>> r195709, with LOADER_ZFS_SUPPORT?=YES in /etc/make.conf.
>
> I just checked that my basic procedure is sane by creating a single 
> vdev pool (zpool create /dev/gpt/zfs0), and that is booting and 
> working just fine.
>
>
> Stefan
>
I got the same kind of errors with 8.0-BETA1 (rebuilt loader with 
ZFS_SUPPORT) with raidz on a VirtualBox.
I however got some hints :
Tried with single disk on pool : works like a charm.
Tried with a mirror : the loader only 'sees' the first disk. Could that 
be the source of our problems ?

BTX loader only shows drives A: and C:

lsdev -v gives :
cd devices:
disk devices:
    disk0:   BIOS drive A:
    disk1:   BIOS drive C:
      disk1p1: FreeBSD boot 64KB
      disk1p2: FreeBSD ZFS 19GB
pxe devices:
zfs devices:
  pool: zroot
config:

        NAME             STATE
        zroot            DEGRADED
          mirror        DEGRADED
            gpt/zfs1    ONLINE
            gpt/zfs2    OFFLINE

As the mirror is degraded but readable, the loader is able to boot.
Could it be a BIOS or boot0 problem ?

Arnaud