After live upgrading Nevada from 113 to 114 I started VirtualBox and hit this bug: http://www.virtualbox.org/ticket/3981
and as a consequence the system paniced. As a workaround I substituted the VBox kernel module. I didn't reboot and the system paniced another time. During the subsequent startup the system told me to boot into failsafe mode to fix the boot archive and when I did that I got the following message:
krtld: bind_primary(): no relocation information found for module /plaftorm/i86pc/kernel/amd64/unix
krtld: error during initial load/link phase
krtld could neither locate nor resolve symbols for:
in the boot archive. Please verify that this file
matches what is found in the boot archive.
You may need to boot using the Solaris failsafe to fix this.
Unable to boot
Press any key to reboot.
I don't know if those system panics could affect the miniroot but I don't feel comfortable working without an available failsafe image. Is there any way to restore it?