You have installed software updates to a new boot environment (BE) and have activated that the
booting to the new BE, you notice system errors. You want to boot to the last known good
configuration.
Which option would you use on a SPARC system to boot to the currentBE boot environment?
A.
boot �L currentBE
B.
boot �Z rpool/ROOT/currentBE
C.
boot �a Enter the currentBE dataset name when prompted.
D.
boot rpool/ROOT/currentBE
E.
boot �m currentBE
F.
beadm activate currentBE
Explanation:
You can change an inactive boot environment into an active boot environment. Only
one boot environment can be active at a time. The newly activated boot environment becomes the
default environment upon reboot.
How to Activate an Existing Boot Environment
beadm activate beName
beName is a variable for the name of the boot environment to be activated.
Note the following specifications.
beadm activate beName activates a boot environment by setting the bootable pool property,
bootfs, to the value of the ROOT dataset of the boot environment that is being activated.
beadm activate sets the newly activated boot environment as the default in the menu.lst file.The newly activated boot environment is now the default on the x86 GRUB menu or SPARC boot
menu.
Reference: Changing the Default Boot Environment
Booting a Solaris System
b
I think A is correct
boot -L
then select currentBE fro the menu which boot -L command execute
Maybe F is correct according to the subject of this question
correct, boot -L will give you the available BEs to select from but then after selecting, it will tell to run the boot -Z command.
Example:
{1c} ok boot -L
SC Alert: Host System has Reset
Sun Fire T200, No Keyboard
Copyright (c) 1998, 2011, Oracle and/or its affiliates. All rights reserved.
OpenBoot 4.30.4.d, 16256 MB memory available, Serial #74139288.
Ethernet address 0:14:4f:6b:46:98, Host ID: 846b4698.
Boot device: /pci@780/pci@0/pci@9/scsi@0/disk@0,0:a File and args: -L
1 Oracle Solaris 11.1 SPARC
2 s11u1_backup
3 s11u1_backup2
Select environment to boot: [ 1 – 3 ]: 3
To boot the selected entry, invoke:
boot [] -Z rpool/ROOT/s11u1_backup2
Program terminated
{0} ok boot -Z rpool/ROOT/s11u1_backup2
B is correct answer according to the subject of this question.
If boot failed you can use boot -Z to specify ZFS boot environment on SPARC system.
F – question indicates server already booted from newBE. You would have to activate currentBE as last known good image to be active on reboot. On reboot server would boot from currentBE.
Hi John,
The actual exam question states: “When booting to the new BE, you notice system errors”
The server is NOT already booted.
As mentioned above, B is the correct answer: boot -Z rpool/ROOT/currentBE
B
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