Merge "VMAX doc - Queens feature documentation"

doc/source/configuration/block-storage/drivers/emc-vmax-driver.rst

@@ -1028,10 +1028,9 @@ Assumptions, Restrictions and Pre-Requisites
 
    .. code-block:: console
 
-      # symaccess -sid <SymmID> -iscsi <iscsi>
-                  enable chap |
-                  disable chap |
-                  set chap -cred <Credential> -secret <Secret>
+      # symaccess -sid <SymmID> -iscsi <iscsi> \
+                  {enable chap | disable chap | set chap} \
+                   -cred <Credential> -secret <Secret>
 
       # symaccess -sid 128 \
                   -iscsi iqn.1991-05.com.company.lcseb130 \
@@ -1058,8 +1057,6 @@ Settings and Configuration
    .. code-block:: ini
 
       [VMAX_ISCSI_DIAMOND]
-      image_volume_cache_enabled = True
-      volume_clear = zero
       volume_driver = cinder.volume.drivers.dell_emc.vmax.iscsi.VMAXISCSIDriver
       volume_backend_name = VMAX_ISCSI_DIAMOND
       san_ip = 10.10.10.10
@@ -1224,9 +1221,6 @@ Configure the source and target arrays
       vmax_srp = SRP_1
       vmax_array = 000123456789
       vmax_port_groups = [OS-FC-PG]
-      use_chap_auth = True
-      chap_username = my_username
-      chap_password = my_password
       volume_backend_name = VMAX_FC_REPLICATION
       replication_device = target_device_id:000197811111,
                            remote_port_group:os-failover-pg,
@@ -1388,6 +1382,18 @@ appearing that they all point to the one device. In order to do this,
 there needs to be multipath software running to manage writing to the
 multiple paths.
 
+Known issues
+------------
+
+.. note::
+
+   There is a known issue which can occasionally occur when certain operations
+   on replicated volumes are invoked concurrently. This can cause some of
+   these operations to fail, but they should be successful on subsequent
+   attempts. Currently, this limitation applies to concurrent deletion of
+   replicated volumes, and concurrent management of existing volumes into a
+   replication volume type.
+
 
 Volume retype -  storage assisted volume migration
 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~