diff --git a/content/docs/1.5.0/references/storage-class-parameters.md b/content/docs/1.5.0/references/storage-class-parameters.md
index cfe9c444b..11ba63995 100644
--- a/content/docs/1.5.0/references/storage-class-parameters.md
+++ b/content/docs/1.5.0/references/storage-class-parameters.md
@@ -193,9 +193,9 @@ A list of recurring jobs that are to be run on a volume.
 > More details in [Scheduling](../../volumes-and-nodes/scheduling).
 
 #### Backend Store Driver *(field: `parameters.backendStoreDriver`)*
-> Default: `""`  
+> Default: `"v1"`  
 
-  - Use "spdk" to run the v2 SPDK-based engine.
+  - Use "v2" to run the v2 SPDK-based engine (experimental in 1.5.)  If empty, "v1" is assumed.
 
 > Global setting: [V2 Data Engine](../settings#v2-data-engine).  
 > More details in [V2 Data Engine Quick Start](../../spdk/quick-start#create-a-storageclass).
diff --git a/content/docs/1.5.1/references/storage-class-parameters.md b/content/docs/1.5.1/references/storage-class-parameters.md
index cfe9c444b..11ba63995 100644
--- a/content/docs/1.5.1/references/storage-class-parameters.md
+++ b/content/docs/1.5.1/references/storage-class-parameters.md
@@ -193,9 +193,9 @@ A list of recurring jobs that are to be run on a volume.
 > More details in [Scheduling](../../volumes-and-nodes/scheduling).
 
 #### Backend Store Driver *(field: `parameters.backendStoreDriver`)*
-> Default: `""`  
+> Default: `"v1"`  
 
-  - Use "spdk" to run the v2 SPDK-based engine.
+  - Use "v2" to run the v2 SPDK-based engine (experimental in 1.5.)  If empty, "v1" is assumed.
 
 > Global setting: [V2 Data Engine](../settings#v2-data-engine).  
 > More details in [V2 Data Engine Quick Start](../../spdk/quick-start#create-a-storageclass).
diff --git a/content/docs/1.5.2/references/storage-class-parameters.md b/content/docs/1.5.2/references/storage-class-parameters.md
index cfe9c444b..11ba63995 100644
--- a/content/docs/1.5.2/references/storage-class-parameters.md
+++ b/content/docs/1.5.2/references/storage-class-parameters.md
@@ -193,9 +193,9 @@ A list of recurring jobs that are to be run on a volume.
 > More details in [Scheduling](../../volumes-and-nodes/scheduling).
 
 #### Backend Store Driver *(field: `parameters.backendStoreDriver`)*
-> Default: `""`  
+> Default: `"v1"`  
 
-  - Use "spdk" to run the v2 SPDK-based engine.
+  - Use "v2" to run the v2 SPDK-based engine (experimental in 1.5.)  If empty, "v1" is assumed.
 
 > Global setting: [V2 Data Engine](../settings#v2-data-engine).  
 > More details in [V2 Data Engine Quick Start](../../spdk/quick-start#create-a-storageclass).
diff --git a/content/docs/1.6.0/references/settings.md b/content/docs/1.6.0/references/settings.md
index acd5b6a5a..12a87fc59 100644
--- a/content/docs/1.6.0/references/settings.md
+++ b/content/docs/1.6.0/references/settings.md
@@ -577,7 +577,10 @@ When this setting is un-checked, the Longhorn Manager will schedule replicas on
 
 When this setting is checked, the Longhorn Manager will allow scheduling on nodes with existing healthy replicas of the same volume.
 
-When this setting is un-checked, the Longhorn Manager will not allow scheduling on nodes with existing healthy replicas of the same volume.
+When this setting is un-checked, Longhorn Manager will forbid scheduling on nodes with existing healthy replicas of the same volume.
+
+> **Note:**
+>   - This setting is superseded if replicas are forbidden to share a zone by the Replica Zone Level Anti-Affinity setting.
 
 #### Replica Zone Level Soft Anti-Affinity
 
@@ -585,7 +588,7 @@ When this setting is un-checked, the Longhorn Manager will not allow scheduling
 
 When this setting is checked, the Longhorn Manager will allow scheduling new replicas of a volume to the nodes in the same zone as existing healthy replicas.
 
-When this setting is un-checked, Longhorn Manager will not allow scheduling new replicas of a volume to the nodes in the same zone as existing healthy replicas.
+When this setting is un-checked, Longhorn Manager will forbid scheduling new replicas of a volume to the nodes in the same zone as existing healthy replicas.
 
 > **Note:**
 >   - Nodes that don't belong to any zone will be treated as if they belong to the same zone.
@@ -597,10 +600,11 @@ When this setting is un-checked, Longhorn Manager will not allow scheduling new
 
 When this setting is checked, the Longhorn Manager will allow scheduling new replicas of a volume to the same disks as existing healthy replicas.
 
-When this setting is un-checked, Longhorn Manager will not allow scheduling new replicas of a volume to the same disks as existing healthy replicas.
+When this setting is un-checked, Longhorn Manager will forbid scheduling new replicas of a volume to the same disks as existing healthy replicas.
 
 > **Note:**
 >   - Even if the setting is "true" and disk sharing is allowed, Longhorn will seek to use a different disk if possible, even if on the same node.
+>   - This setting is superseded if replicas are forbidden to share a zone or a node by either of the other Soft Anti-Affinity settings.
 
 #### Replica Auto Balance
 
diff --git a/content/docs/1.6.0/references/storage-class-parameters.md b/content/docs/1.6.0/references/storage-class-parameters.md
index e12e02c04..3a6b63dba 100644
--- a/content/docs/1.6.0/references/storage-class-parameters.md
+++ b/content/docs/1.6.0/references/storage-class-parameters.md
@@ -203,9 +203,9 @@ A list of recurring jobs that are to be run on a volume.
 > More details in [Scheduling](../../volumes-and-nodes/scheduling).
 
 #### Backend Store Driver *(field: `parameters.backendStoreDriver`)*
-> Default: `""`  
+> Default: `"v1"`  
 
-  - Use "spdk" to run the v2 SPDK-based engine.
+  - Use "v2" to run the v2 SPDK-based engine (experimental in 1.6.)  If empty, "v1" is assumed.
 
 > Global setting: [V2 Data Engine](../settings#v2-data-engine).  
 > More details in [V2 Data Engine Quick Start](../../spdk/quick-start#create-a-storageclass).