diff --git a/config/example/node.yaml b/config/example/node.yaml
index 36b77af79..6a316e835 100644
--- a/config/example/node.yaml
+++ b/config/example/node.yaml
@@ -147,7 +147,12 @@ storage:
         remover_sleep_interval: 5m  # frequency of the garbage collector invocation
 
     0:
-      mode: "read-only"  # mode of the shard, must be one of the: "read-write" (default), "read-only"
+      mode: read-only  # mode of the shard, must be one of the:
+        # read-write (default)
+        # read-only
+        # degraded
+        # degraded-read-only
+        # disabled (do not work with the shard, allows to not remove it from the config)
       resync_metabase: false  # sync metabase with blobstor on start, expensive, leave false until complete understanding
 
       writecache:
diff --git a/docs/storage-node-configuration.md b/docs/storage-node-configuration.md
index 51785e981..5ac959515 100644
--- a/docs/storage-node-configuration.md
+++ b/docs/storage-node-configuration.md
@@ -169,13 +169,14 @@ Contains configuration for each shard. Keys must be consecutive numbers starting
 `default` subsection has the same format and specifies defaults for missing values.
 The following table describes configuration for each shard.
 
-| Parameter         | Type                                        | Default value | Description                              |
-|-------------------|---------------------------------------------|---------------|------------------------------------------|
-| `resync_metabase` | `bool`                                      | `false`       | Flag to enable metabase resync on start. |
-| `writecache`      | [Writecache config](#writecache-subsection) |               | Write-cache configuration.               |
-| `metabase`        | [Metabase config](#metabase-subsection)     |               | Metabase configuration.                  |
-| `blobstor`        | [Blobstor config](#blobstor-subsection)     |               | Blobstor configuration.                  |
-| `gc`              | [GC config](#gc-subsection)                 |               | GC configuration.                        |
+| Parameter         | Type                                        | Default value | Description                                                                                               |
+|-------------------|---------------------------------------------|---------------|-----------------------------------------------------------------------------------------------------------|
+| `mode`            | `string`                                    | `read-write`  | Shard Mode.<br/>Possible values:  `read-write`, `read-only`, `degraded`, `degraded-read-only`, `disabled` |
+| `resync_metabase` | `bool`                                      | `false`       | Flag to enable metabase resync on start.                                                                  |
+| `writecache`      | [Writecache config](#writecache-subsection) |               | Write-cache configuration.                                                                                |
+| `metabase`        | [Metabase config](#metabase-subsection)     |               | Metabase configuration.                                                                                   |
+| `blobstor`        | [Blobstor config](#blobstor-subsection)     |               | Blobstor configuration.                                                                                   |
+| `gc`              | [GC config](#gc-subsection)                 |               | GC configuration.                                                                                         |
 
 ### `blobstor` subsection