-# It's code looks like this:
-# if [[ ! -e /a/bin/fai/fai-wrapper ]]; then
-# case $HOSTNAME in
-# tp) DEBIAN STABLE VOL_STABLE STABLE_FREE;;
-# # add more multi-boot hostnames here
-# esac
-# fi
-#
-# Each host defines the base distro: UBUNTU or DEBIAN.
-# the disto version, also the basefile name if we aren't installing debian stable:
-# STABLE, STRETCH64, XENIAL64, BELANOS64
-# the distro subvol name, we can add as many of these as we want:
-# VOL_STABLE, VOL_STABLE_BOOTSTRAP, VOL_STRETCH, VOL_XENIAL, VOL_BELANOS
-# Using VOL_STABLE_BOOTSTRAP sets up the install to act like a pxe rom if
+
+#
+#
+# Each host defines following:
+# The base distro:
+# UBUNTU or nothing. DEBIAN is always defined as a base.
+#
+# The base disto version, only use so far is the basefile name if it exists.
+# Debian stable basefile gets built by faisetup and gets used otherwise.
+# With X suffix, means it has gone through the dirinstall process and has eXtra
+# things installed, to speed up installation.
+#
+# STRETCH64, BUSTER64, BULLSEYE64, BOOKWORM64
+# FLIDAS64, FLIDAS64BIG, ETIONA64, NABIA64
+# XENIAL64, BIONIC64, FOCAL64,
+#
+# The distro subvol name, we can add as many of these as we want:
+# VOL_TESTING, VOL_STRETCH, VOL_BUSTER, VOL_BULLSEYE, VOL_BOOKWORM
+# VOL_FLIDAS, VOL_ETIONA, VOL_NABIA
+# VOL_XENIAL, VOL_BIONIC VOL_FOCAL
+# VOL_BUSTER_BOOTSTRAP.
+# Using VOL_BUSTER_BOOTSTRAP sets up the install to act like a pxe rom if