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

[Matt Reimer]

On Wed, Feb 17, 2010 at 7:46 AM, Chris <behrnetworks at gmail.com> wrote:

> Ok, went back to my 8.0-RELEASE memstick image and after playing with
> the GPT settings a little and dd'ing all zeros to the disk first, I
> get a little farther this time. I'm seeing the following:
>
> -----------------------------
> BTX loader 1.00   BTX version is 1.02
> Consoles: internal video/keyboard
> BIOS drive C: is disk0
> BIOS 631kB/1832448kB available memory
>
> FreeBSD/i386 bootstrap loader, Revision 1.0
> (root@, Wed Feb 17 10:27:40 UTC 2010)
> Loading /boot/defaults/loader.conf
> /boot/kernel/kernel text=0x8924d8
> -----------------------------
>
> And that's as far as it gets. Per the handbook, that appears to be
> stuck somewhere between boot2 and /boot/loader. To me, it looks like
> it's having a problem loading the kernel. As far as my suspicion of
> the BIOS not correctly reporting the drives, it looks to me like the
> bootloader is seeing them so maybe that can be ruled out. I'm glad to
> see it get farther this time but this is still weird.
>
> Any ideas on this one?
>

IIRC the 8.0-RELEASE gptzfsboot/loader lacked some bugfixes. Try using
gptzfsboot and zfsloader from -STABLE.

Matt