dasjoe

. /etc/os-release

cat > /etc/apt/apt.conf.d/01norecommend <<'EOF'
APT::Install-Recommends "0";
APT::Install-Suggests "0";
EOF

cat > /etc/apt/apt.conf.d/99AutomaticClean <<'EOF'
DSELECT::Clean "always";
EOF

dasjoe

Keybase proof

I hereby claim:

• I am dasjoe on github.
• I am dasjoe (https://keybase.io/dasjoe) on keybase.
• I have a public key ASDi4qMKAgChZZM62sxPcPVu6eq4_suF-VrqPNtuK6zKOAo

To claim this, I am signing this object:

dasjoe

# Samsung 850 Pro 256 GB: 2 * 8 * 86 Gibit + 2 * 4 * 86 Gibit
# 541065216 - actual 512B sectors
# 500118192 - visible sectors, rest is hidden even to hdparm
# 405798912 - 25% OP, mod 8 = 0 for ashift=12
#
hdparm -Np405798912 --yes-i-know-what-i-am-doing /dev/disk/by-id/ata-Samsung_SSD_850_PRO_256GB_S251NX0H441956W

hdparm --user-master u --security-set-pass Eins /dev/disk/by-id/ata-Samsung_SSD_850_PRO_256GB_S251NX0H441956W
time hdparm --user-master u --security-erase Eins /dev/disk/by-id/ata-Samsung_SSD_850_PRO_256GB_S251NX0H441956W

dasjoe

# Disable automatic installation of recommended or suggested packages
cat > /etc/apt/apt.conf.d/01norecommend <<EOF
APT::Install-Recommends "0";
APT::Install-Suggests "0";
EOF

# Get required tools, i.e. debootstrap and ZFS userspace tools
apt-get --quiet update
apt-get --yes --quiet install debootstrap zfsutils-linux dosfstools

dasjoe

# Boot Ubuntu 16.04 LTS from a ZFS rpool
#
# 
# We boot the remote server to its (Debian or Ubuntu based) rescue mode
# then ssh into it with forwarded ports for the VM's SSH and VNC servers
#
# Shell here documents that are not passed to a command are used for
# documentation and copy and paste sources.
# "<<'LOCAL'" denotes commands to be run on the local machine, 'RESCUE'
# and 'VM' should be run in the rescue system or the VM, respectively.

dasjoe

# apt-add-repository ppa:zfs-native/stable
# apt-get update
# apt-get install ubuntu-zfs
# apt-get install debootstrap

HOST=vm1
DISKS="/dev/disk/by-id/ata-Samsung_SSD_850_EVO_120GB_S21UNSAG310692M"

zpool create \
  -f \

dasjoe

# ZFS boot stub for initramfs-tools.
#
# In the initramfs environment, the /init script sources this stub to
# override the default functions in the /scripts/local script.
#
# Enable this by passing boot=zfs on the kernel command line.
#


pre_mountroot()

dasjoe

; global parameters
[global]
fallocate=none
directory=/tank/bench
bs=4k-128k
size=16g
end_fsync=1
loops=1
rwmixread=70
;buffer_compress_percentage=0

dasjoe

#!/bin/bash

DIR='/dev/disk/by-id/'
#DIR='/dev/disk/by-vdev/'
#DIR='/dev/disk/by-path/'

PREFIX='ata-*'
#PREFIX='pci-*'
#PREFIX='*'

dasjoe

#!/bin/bash

# source: https://groups.google.com/a/zfsonlinux.org/d/msg/zfs-discuss/i09_VBXAyig/UWjPa23cQ0YJ

pids=""
tdir=/tmp/memtest.$$

function cleanup()
{
  [[ -n "${pids}" ]] && kill -9 ${pids} &> /dev/null || true