> I just performed an image-update from b98 to b99. On reboot, the boot
> process stops at a grub prompt, suggesting that my grub configuration
> got wiped. How can I boot into my system to restore my grub
> configuration (I'm not quite sure how I'd specify the root partition
> on a system with ZFS)?
Before doing the image-update, did you happen to upgrade your ZFS pool
version? There is a known issue here when upgrade your pool version
and ZFS root.
To recover, try entering the following into your GRUB prompt
bootfs rpool/ROOT/opensolaris-<N>
kernel$ /platform/i86pc/kernel/$ISADIR/unix -B $ZFS-BOOTFS
module$ /platform/i86pc/$ISADIR/boot_archive
where <N> is the previous boot environment's boot number (if you don't
remember this, you may be able to infer a value from how many
successful image-updates you've done. We know this is terrible and we
badly need a better naming scheme here and of course, failure to boot
after an update is unacceptable).
Once you've booted, you should be able to recover your GRUB boot block
by running
$ pfexec mount -F zfs rpool/ROOT/opensolaris-<N+1> /mnt
$ pfexec /mnt/boot/solaris/bin/update_grub -R /mnt
Finally, please file a bug on defect.opensolaris.org with as much
detail as you can provide on the system in question, drive types and
the ZFS configuration (single disk or mirrored).
dsc
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