Root mount from ZFS takes forever...literally.

[Pawel Tyll]

> Are you *absolutely sure* the problem has to do with ZFS?  I see you
> mention PXE booting......
PXE boot was used as an emergency boot method to fix the problem.

> This sounds much like an environment where serial console is set up
> incorrectly; kernel messages will be seen up to the final "Mounting
> root..." message, but everything past that goes to VGA console (or
> serial console, depends on the configuration mishap).
I thought so too at first, but then this doesn't explain lack of any
disk activity after the message and network unavailability.