Solaris - Booting into a zfs root from ok prompt

If the root is in zfs, to boot into a specific Boot Environment, below process can be used

In our case we have 2 BE's but one is not visible 

{0} ok boot -L
Boot device: /pci@400/pci@0/pci@8/scsi@0/disk@0:a  File and args: -L
1 sol10u8
Select environment to boot: [ 1 - 1 ]: 1

To boot the selected entry, invoke:
boot [] -Z rpool/ROOT/sol10u8


Program terminated

However, we can still invoke it from ok prompt, if we know the zfs root fs name.


{0} ok boot -Z rpool/ROOT/sol10u9


T5240, No Keyboard
Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved.
OpenBoot 4.33.6.b, 130848 MB memory available, Serial #94648388.
Ethernet address 0:21:28:a4:38:44, Host ID: 85a43844.



Boot device: /pci@400/pci@0/pci@8/scsi@0/disk@0:a  File and args: -Z rpool/ROOT/sol10-u9
SunOS Release 5.10 Version Generic_147440-11 64-bit
Copyright (c) 1983, 2012, Oracle and/or its affiliates. All rights reserved.
WARNING: /scsi_vhci/ssd@g60060e80153269000001326900002023 (ssd16):

        Corrupt label; wrong magic number