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

[Jonathan]

On 6/27/2009 12:49 AM, Norikatsu Shigemura wrote:
> Hi Jonathan.
>
> On Thu, 25 Jun 2009 23:37:34 -0400
> Jonathan<jonathan at kc8onw.net>  wrote:	
>> I currently seem to be having 2 issues.  One is that I get several
>> screenfulls of "error 1 lba xxx" with numbers like 4292179434 and
>> 4292179446.  Similar errors were reported here
>> http://lists.freebsd.org/pipermail/freebsd-fs/2008-December/005511.html
>> but I did not find anything in that thread that worked for me.  The
>> error message itself comes from here
>> http://svn.freebsd.org/viewvc/base/head/sys/boot/i386/gptboot/gptboot.c?revision=181436&view=markup
>
> 	I don't have any idea.
>
>> The loader then proceeds to load the kernel, opensolaris, and zfs
>> modules.  Right before the displaying the loader menu it shows the
>> message "ZFS: i/o error - all block copies unavailable" which comes from
>> here
>> http://svn.freebsd.org/viewvc/base/head/sys/boot/zfs/zfsimpl.c?revision=192194&view=markup
>
> 	I confirmed this issue on my environment.  I was analyzing it.
> 	So I understood that gptzfsboot/loader doesn't support gang
> 	block.  As the result, gptzfsboot doesn't read gang-blocked
> 	loader or kernel, loader doesn't read gang-blocked kernel or
> 	modules by "ZFS: i/o error - all block copies unavailable".
>
> 	I'm trying to implement gang-block support, but I done checksum
> 	code.  I'm trying to implement 'read gang block' code.  But I
> 	cannot find 'read gang block' code on zfs, yet.  So now analyzing
> 	phase....

I tried your patch (it needed a few tweaks to make it compile) but I 
still have the same errors as before.

Jonathan