ha crs: improve introduction and add screenshot of option

[pve-docs.git] / pvesm.adoc

diff --git a/pvesm.adoc b/pvesm.adoc
index c8e2347ab87e52a199470bc799a9bfda583fcb82..6ade1a4c86fb0a6d28dc4f1a15f89eba4b7aba28 100644 (file)
--- a/pvesm.adoc
+++ b/pvesm.adoc
@@ -93,7 +93,7 @@ That way you get a `shared` LVM storage.
 Thin Provisioning
 ~~~~~~~~~~~~~~~~~
 
-A number of storages, and the Qemu image format `qcow2`, support 'thin
+A number of storages, and the QEMU image format `qcow2`, support 'thin
 provisioning'.  With thin provisioning activated, only the blocks that
 the guest system actually use will be written to the storage.
 
@@ -195,7 +195,7 @@ this property to select what this storage is used for.
 
 images:::
 
-KVM-Qemu VM images.
+QEMU/KVM VM images.
 
 rootdir:::
 
@@ -239,6 +239,12 @@ format::
 
 Default image format (`raw|qcow2|vmdk`)
 
+preallocation::
+
+Preallocation mode (`off|metadata|falloc|full`) for `raw` and `qcow2` images on
+file-based storages. The default is `metadata`, which is treated like `off` for
+`raw` images. When using network storages in combination with large `qcow2`
+images, using `off` can help to avoid timeouts.
 
 WARNING: It is not advisable to use the same storage pool on different
 {pve} clusters. Some storage operation need exclusive access to the
@@ -436,6 +442,8 @@ include::pve-storage-cephfs.adoc[]
 
 include::pve-storage-btrfs.adoc[]
 
+include::pve-storage-zfs.adoc[]
+
 
 ifdef::manvolnum[]
 include::pve-copyright.adoc[]