Which two steps are still required to make the system bootable?

A recursive snapshot was taken of the root pool and the snapshot streams are stored on a remote
system. The boot disk has failed, has been replaced, and the root pool snapshots have been
restored. Which two steps are still required to make the system bootable?

A.
Re-create the swap and dump devices.

B.
Install the boot blocks on the new disk.

C.
Restore the snapshot stream.

D.
Set the bootfs property on the root pool.

E.
Perform a ZFS rollback to restore the file systems in the root pool.

Explanation:
See steps 7 and 8 below.
How to Re-create a ZFS Root Pool and Restore Root Pool Snapshots
1. Boot from an installation DVD or the network.
2. Mount the remote snapshot file system if you have sent the root pool snapshots as a file to the
remote system.
3. If the root pool disk is replaced and does not contain a disk label that is usable by ZFS, you
must relabel the disk.
4. Re-create the root pool.
5. Restore the root pool snapshots.
6. Verify that the root pool datasets are restored.
7. Set the bootfs property on the root pool BE.
8. Install the boot blocks on the new disk.
9. Reboot the system.

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All the steps are performed on the local system.

Boot from a CD/DVD or the network.

SPARC: Select one of the following boot methods:

ok boot net -s
ok boot cdrom -s
If you don’t use -s option, you’ll need to exit the installation program.

x86: Select the option for booting from the DVD or the network. Then, exit the installation program.

Mount the remote snapshot dataset.

For example:

# mount -F nfs remote-system:/rpool/snaps /mnt
If your network services are not configured, you might need to specify the remote-system’s IP address.

If the root pool disk is replaced and does not contain a disk label that is usable by ZFS, you must relabel the disk.

For more information about relabeling the disk, go to the following site:

http://www.solarisinternals.com/wiki/index.php/ZFS_Troubleshooting_Guide

Recreate the root pool.

For example:

# zpool create -f -o failmode=continue -R /a -m legacy -o cachefile=
/etc/zfs/zpool.cache rpool c1t1d0s0
Restore the root pool snapshots.

This step might take some time. For example:

# cat /mnt/rpool.0804 | zfs receive -Fdu rpool
Using the -u option means that the restored archive is not mounted when the zfs receive operation completes.

Verify that the root pool datasets are restored.

For example:

# zfs list
NAME USED AVAIL REFER MOUNTPOINT
rpool 6.17G 60.8G 98K /a/rpool
rpool@0804 0 – 98K –
rpool/ROOT 4.67G 60.8G 21K /legacy
rpool/ROOT@0804 0 – 21K –
rpool/ROOT/zfsBE 4.67G 60.8G 4.67G /a
rpool/ROOT/zfsBE@0804 398K – 4.67G –
rpool/dump 1.00G 60.8G 1.00G –
rpool/dump@0804 0 – 1.00G –
rpool/swap 517M 61.3G 16K –
rpool/swap@0804 0 – 16K –
Set the bootfs property on the root pool BE.

For example:

# zpool set bootfs=rpool/ROOT/zfsBE rpool
Install the boot blocks on the new disk.

SPARC:

# installboot -F zfs /usr/platform/`uname -i`/lib/fs/zfs/bootblk /dev/rdsk/c1t1d0s0
x86:

# installgrub /boot/grub/stage1 /boot/grub/stage2 /dev/rdsk/c1t1d0s0
Reboot the system.

# init 6