GPT boot with ZFS RAIDZ "ZFS: i/o error - all block copies unavailable"

[alteriks at gmail.com]

On Thursday 29 October 2009 11:36:38 Robert Noland wrote:
> Ok, if you are getting this... It may be helpful if you can run "zdb
> -uuu zroot", so I can see what is going on with the root block pointer.
> I think you should be able to do that from fixit.  Also note that you
> don't have the latest version of the loader if it is printing "lld",
> though as long as all of the drives are detected it likely won't make a
> difference.  The "can't read MOS" error is the first attempt to read
> from the pool after probing all of the devices to sort out the
> configuration.  Everything up to this point reads data directly from the
> vdev labels on each drive, so this is the first time that it tries to
> read from the pool.
> 
Sorry I forgot about this part.
Here is zdb -uuu zroot
Uberblock

        magic = 0000000000bab10c
        version = 13
        txg = 111
        guid_sum = 14036990686815153767
        timestamp = 1257636491 UTC = Sat Nov  7 23:28:11 2009
        rootbp = [L0 DMU objset] 400L/200P DVA[0]=<0:110004a000:400> 
DVA[1]=<0:40038400:400> DVA[2]=<0:1980041c00:400> fletcher4 lzjb LE contiguous 
birth=111 fill=126 cksum=7e96f92e7:357c99e1eb9:b7d10db3a713:1ac2df05bd147a