Seeing the dreaded "ZFS: i/o error - all block copies unavailable" on 9.0-CURRENT

[Pegasus Mc Cleaft]

Hello Chris, Scott & Current

	I use gptzfsboot on my AMD64 (current) machine all the time and also on 
my laptop. I am not sure if this will cause the problem you are seeing but I 
know I ran into a lot of trouble depending on what type of pool I was 
creating.

	I believe this is correct, and if I am not than I apologise in advance, 
but.... 

	If you are trying to boot off a linear type pool (A single disk or a 
mirror) your bootable filing system has to be a zfs filing system beneath the 
root pool (IE: zroot/boot). If you are trying to boot off a zraid pool, your 
bootable filing system must be the root filing system of the pool (IE: zroot)

	You must also include the appropriate declaration in the 
/boot/loader.conf file:

(for a zraid pool)
zfs_load="YES"
vfs.root.mountfrom="zfs:zpool"

(for a linear type)
zfs_load="YES"
vfs.root.mountfrom="zfs:zpool/root"

	If I try any other method, zboot explodes in a myriad of different ways. 

I hope this helps
Peg


On Wednesday 17 February 2010 02:49:56 Chris wrote:
> Scot,
> 
> I did, as part of step 7 in section 1:
> 
> 7. Create ZFS Pool zroot
> 
>  Fixit# mkdir /boot/zfs
>  Fixit# zpool create zroot /dev/gpt/disk0
>  Fixit# zpool set bootfs=zroot zroot