ipmiutil is available for Linux, Windows, Solaris, Mac OSX, and FreeBSD and can be downloaded from: http://ipmiutil.sourceforge.net/

The following command will enable LAN access for IPMI on IP 10.1.2.3 with gateway 10.1.2.1, username admin and password Password

ipmiutil lan –e –I 10.1.2.3 -f 2 -G 10.1.2.1 –u admin –p Password

To set shared LAN on Dell servers (useful if the servers does not have a DRAC card):

ipmiutil delloem lan set shared

This assumes that the two drives are /dev/sda and /dev/sdb.
Where /dev/sda is the existing drive and /dev/sdb is the new drive,
and that the system partition is sda1/sdb1.

Copy the partition table from /dev/sda to /dev/sdb

sfdisk -d /dev/sda | sfdisk --force /dev/sdb

Set the filesystem type to “fd” (Linux raid autodetect)

sfdisk --change-id /dev/sdb 1 fd

Zero the superblock to make sure that mdadm will not detect an existing volume

mdadm --zero-superblock /dev/sdb1

Create the RAID 1 with the new disk only

mdadm --create /dev/md0 --level=1 --raid-disks=2 missing /dev/sdb1

Add the raid to mdadm.conf so that it will be configured automatically on boot

mdadm --examine --scan >> /etc/mdadm/mdadm.conf

Create the physical volume on the new raid volume

pvcreate /dev/md0

Create a volume group on the new physical volume

vgcreate vg_hostname /dev/md0

Create a logical volume on then new volume group

lvcreate -L 100G -n root vg_hostname

Create an ext4 filesystem on the logical volume

mkfs.ext4 /dev/vg_hostname/root

Mount the new filesystem

mount /dev/vg_hostname/root /mnt

Copy the old system files

rsync -auxHAXSv --exclude=/dev/* --exclude=/proc/* --exclude=/sys/* --exclude=/tmp/* --exclude=/mnt/* --exclude=/afs/* / /mnt/

Modify /etc/fstab, the line for / should be

/dev/vg_hostname/root / ext4    errors=remount-ro 0       1

Create /etc/grub.d/09-lvm with contents:

#!/bin/sh
exec tail -n +3 $0

menyentry 'New system' --class gnu-linux --class gnu --class os {
    insmod part_msdos
    insmod diskfilter
    insmod mdraid1x
    insmod lvm
    insmod ext2
    set root='lvm/vg_hostname-root'
    linux /boot/vmlinuz-$(uname -r) root=/dev/mapper/vg_hostname-root ro
    initrd /boot/initrd.img-$(uname -r)
}

Add the following to /etc/default/grub:

GRUB_PRELOAD_MODULES="lvm"

Update the grub configuration files:

update-grub

Update the initramfs

update-initramfs -c -k $(uname -r) -u

Reboot and it should now boot from the LVM volume

reboot

Verify that we have booted from the LVM volume

mount
# the output should contain the following
/dev/mapper/vg_hostname-root on / type ext4 (rw,relatime,errors=remount-ro,data=ordered)

sfdisk –change-id /dev/sda 1 fd 

Add the old drive to the raid:

mdadm --add /dev/md0 /dev/sda1

Update grub config files and initramfs

update-grub
update-initramfs -c -k $(uname -r) -u

Install grub to the devices.

grub-install --recheck /dev/sda
grub-install --recheck /dev/sdb

This post assumes that the zpool is using raw disks instead of partitions.
It is also assumed that the name of the existing zpool is pool0.

Start by booting the livecd and enter the shell.

Import the existing zpool:

# zpool import pool0

Create the new dataset for the root, and set the mountpoint to /mnt for the installation.

# zfs create pool0/ROOT
# zfs create -o mountpoint=/mnt -o canmount=noauto pool0/ROOT/FreeBSD
# zfs mount pool0/ROOT/FreeBSD

 
Fetch the installation files and install the distribution:

# cd /mnt
# fetch ftp://ftp.se.freebsd.org/pub/FreeBSD/releases/amd64/amd64/10.3-RELEASE/base.txz
# fetch ftp://ftp.se.freebsd.org/pub/FreeBSD/releases/amd64/amd64/10.3-RELEASE/kernel.txz
# fetch ftp://ftp.se.freebsd.org/pub/FreeBSD/releases/amd64/amd64/10.3-RELEASE/ports.txz
# fetch ftp://ftp.se.freebsd.org/pub/FreeBSD/releases/amd64/amd64/10.3-RELEASE/src.txz
# tar xvpf base.txz
# tar xvpf kernel.txz
# tar xvpf ports.txz
# tar xvpf src.txz
# cd /

 
Make the system bootable (change ada0 to your hdd):

# echo 'zfs_load="YES"' >> /mnt/boot/loader.conf
# echo 'zfs_enable="YES"' >> /mnt/etc/rc.conf
# zpool set bootfs=pool0/ROOT/FreeBSD pool0
# zfs unmount pool0/ROOT/FreeBSD
# zfs set mountpoint=/ pool0/ROOT/FreeBSD
# zpool export pool0
# sysctl kern.geom.debugflags=0x10
# dd if=/boot/zfsboot of=/dev/ada0 count=1
# dd if=/boot/zfsboot of=/dev/ada0 iseek=1 oseek=1024

 
Reboot and login as root, then change your password and do your usual configuration to /etc/rc.conf.