sureshanaparti commented on code in PR #396:
URL:
https://github.com/apache/cloudstack-documentation/pull/396#discussion_r1588872064
##########
source/adminguide/storage.rst:
##########
@@ -237,6 +238,74 @@ templates, and ISOs.
.. note::
If files or folders are not associated with a cloudstack resource, it
doesn't mean that they are not used by cloudstack.
+
+Setting NFS Mount Options on the Storage Pool
+~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+NFS mount options can be added while creating an NFS storage pool for
+KVM hosts. When the storage pool is mounted on the KVM hypervisor host,
+these options will be used. Options currently tested and supported are
+`vers` and `nconnect`.
+
+Although it depends on the NFS server, but commonly supported `vers` values
+are `3` for NFSv3 and minor versions `4.0, 4.1 and 4.2` for NFSv4.
+`nconnect` values can range from 1 to 16.
+
+Administrator can give the NFS mount options while adding a Primary Storage
+from the Create Zone Wizard as well as the Add Primary Storage form.
+|nfs-mount-options-create-zone-wizard.png|
+|nfs-mount-options-add-primary-storage.png|
+
+NFS mount options can be changed on a pre-existing Storage Pool in maintenance
+mode using the Edit Primary Storage form. Running VMs using volumes in the
+Storage Pool will either be stopped or the volumes would be migrated to other
+available pools upon enabling maintenance mode.
+Storage Pool will be unmounted and mounted again on the KVM hosts using the
+new options upon cancelling the maintenance mode.
+|nfs-mount-options-edit-primary-storage.png|
+
+Mount failing due to an incorrect Mount Option
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+Add Storage Pool will fail with the error ``An incorrect mount option was
specified``.
+
+In the Update storage pool case, cancel maintenance will throw the above error.
+The Administrator has to repeat the process of enabling maintenance mode,
Review Comment:
not need to enable maintenance mode again as pool would be in maintenance
already, admin has to change the mount options to the correct one and then
retry cancel the maintenance mode.
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