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

Doug Poland doug at
Wed Feb 17 19:57:16 UTC 2010

On Wed, February 17, 2010 09:46, Chris 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?
Again, another curiousity from my experiences, try booting in verbose
mode (#5 in boot screen).  If you can't get there, try booting with
your installation media, mount the pool and put "-v" in
pool/boot.config.   It's kind of a long shot...


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