====== ZFS ======
=== RAID ===

== RAID1 ==
  * Create RAID1 without mount point
<code># zpool create -m none data-pool mirror /dev/disk/by-id/ata-Hitachi_... /dev/disk/by-id/ata-SAMSUNG_...</code>

=== Replacing disk ===
  * Replace disk

<code># zpool replace tank /dev/disk/by-id/ata-Hitachi_... /dev/disk/by-id/ata-SAMSUNG_...</code>

  * Replace already removed device
<code># zpool replace data-pool /dev/disk/by-id/ata-QEMU_HARDDISK_QM00011-part1</code>

=== Add devices to pool ===

  * Add vdev (raidz1) to existing pool
<code>zpool add hdd-pool raidz1 /dev/xvdf /dev/xvdg /dev/xvdh</code>

=== Enable periodic scrub (FreeBSD only) ===

<code># cat << EOF >> /etc/periodic.conf
daily_scrub_zfs_enable="YES"
daily_scrub_zfs_default_threshold="28"</code>

=== TRIM (Linux only) ===

  * Run trim on zpool
<code># zpool trim data-pool</code>

  * Check trim status
<code># zpool status -t data-pool</code>

=== Misc ===

  * Create volume
<code># zfs create -V 10G tank/storage</code>

  * Get volume size
<code># zfs get volsize tank/storage</code>

  * Resize volume
<code># zfs set volsize=50G tank/storage</code>

  * SWAP
<code># zfs create -V 4G -b $(getconf PAGESIZE) -o compression=zle \
             -o logbias=throughput -o sync=always \
             -o primarycache=metadata -o secondarycache=none \
             -o com.sun:auto-snapshot=false rpool/swap</code>

  * Enable/disable compression
<code># zfs set compression=lz4 data-pool/data/logs
# zfs set compression=off data-pool/data/logs</code>

  * Set quota
<code># zfs set quota=20G data-pool/data/ISO</code>

  * Get all properties
<code># zfs get all data-pool</code>