+NOTE: LVM requires free space in the VG for snapshot creation (not required for
+lvmthin snapshots).
+
+[[advanced_zfs_options]]
+Advanced ZFS Configuration Options
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+The installer creates the ZFS pool `rpool`. No swap space is created but you can
+reserve some unpartitioned space on the install disks for swap. You can also
+create a swap zvol after the installation, although this can lead to problems.
+(see <<zfs_swap,ZFS swap notes>>).
+
+`ashift`::
+
+Defines the `ashift` value for the created pool. The `ashift` needs to be set at
+least to the sector-size of the underlying disks (2 to the power of `ashift` is
+the sector-size), or any disk which might be put in the pool (for example the
+replacement of a defective disk).
+
+`compress`::
+
+Defines whether compression is enabled for `rpool`.
+
+`checksum`::
+
+Defines which checksumming algorithm should be used for `rpool`.
+
+`copies`::
+
+Defines the `copies` parameter for `rpool`. Check the `zfs(8)` manpage for the
+semantics, and why this does not replace redundancy on disk-level.
+
+`hdsize`::
+
+Defines the total hard disk size to be used. This is useful to save free space
+on the hard disk(s) for further partitioning (for example to create a
+swap-partition). `hdsize` is only honored for bootable disks, that is only the
+first disk or mirror for RAID0, RAID1 or RAID10, and all disks in RAID-Z[123].