diff --git a/chart/Chart.yaml b/chart/Chart.yaml
index b92cb864..ea861e28 100644
--- a/chart/Chart.yaml
+++ b/chart/Chart.yaml
@@ -2,7 +2,7 @@ apiVersion: v2
 name: versitygw
 description: A Helm chart for deploying the Versity S3 Gateway on Kubernetes
 type: application
-version: 0.3.3
+version: 0.3.4
 sources:
   - https://github.com/versity/versitygw
 icon: https://raw.githubusercontent.com/versity/versitygw/main/webui/web/assets/images/Versity-logo-blue-horizontal.png
diff --git a/chart/README.md b/chart/README.md
index 8f561501..c04907c4 100644
--- a/chart/README.md
+++ b/chart/README.md
@@ -63,7 +63,7 @@ You can find the list of available Helm chart versions in the [GitHub packages p
 
 ## Backend Storage
 
-The `gateway.backend.type` value selects the storage backend. Use `gateway.backend.args` to pass backend-specific arguments.
+The `gateway.backend.type` value selects the storage backend. Use `gateway.backend.args` to pass backend-specific arguments. For the POSIX sidecar metadata store and POSIX/ScoutFS object versioning, prefer `gateway.backend.sidecarDir` and `gateway.backend.versioningDir`; the chart mounts those directories from persistent storage and wires the corresponding backend environment variables automatically.
 
 | Backend | Description | Example `gateway.backend.args` |
 |---------|-------------|--------------------------------|
@@ -73,6 +73,26 @@ The `gateway.backend.type` value selects the storage backend. Use `gateway.backe
 | [azure](https://github.com/versity/versitygw/wiki/AzureBlob-Backend) | Azure Blob Storage | `--account myaccount --key mykey` |
 | [plugin](https://github.com/versity/versitygw/wiki/Plugin-Backend) | Custom backend via shared library plugin | `/path/to/plugin.so` |
 
+Example for POSIX with sidecar metadata:
+
+```yaml
+gateway:
+  backend:
+    type: posix
+    args: /mnt/data
+    sidecarDir: /mnt/metadata
+```
+
+Example for POSIX or ScoutFS with object versioning enabled:
+
+```yaml
+gateway:
+  backend:
+    type: posix
+    args: /mnt/data
+    versioningDir: /mnt/versioning
+```
+
 ## Optional Features
 
 | Feature | Key values |
diff --git a/chart/templates/deployment.yaml b/chart/templates/deployment.yaml
index 1f57429b..91ab0946 100644
--- a/chart/templates/deployment.yaml
+++ b/chart/templates/deployment.yaml
@@ -13,6 +13,12 @@
 {{- if and .Values.persistence.create .Values.persistence.hostPath }}
   {{- fail "persistence.create must be false for persistence.hostPath can be set" }}
 {{- end }}
+{{- if and .Values.gateway.backend.sidecarDir (ne .Values.gateway.backend.type "posix") }}
+  {{- fail "gateway.backend.sidecarDir is only supported with the posix backend" }}
+{{- end }}
+{{- if and .Values.gateway.backend.versioningDir (not (or (eq .Values.gateway.backend.type "posix") (eq .Values.gateway.backend.type "scoutfs"))) }}
+  {{- fail "gateway.backend.versioningDir is only supported with the posix and scoutfs backends" }}
+{{- end }}
 apiVersion: apps/v1
 kind: Deployment
 metadata:
@@ -61,6 +67,14 @@ spec:
               value: {{ .Values.gateway.backend.type | quote }}
             - name: VGW_BACKEND_ARGS
               value: {{ .Values.gateway.backend.args | quote }}
+            {{- if .Values.gateway.backend.sidecarDir }}
+            - name: VGW_META_SIDECAR
+              value: {{ .Values.gateway.backend.sidecarDir | quote }}
+            {{- end }}
+            {{- if .Values.gateway.backend.versioningDir }}
+            - name: VGW_VERSIONING_DIR
+              value: {{ .Values.gateway.backend.versioningDir | quote }}
+            {{- end }}
             # Root credentials — sourced from a Kubernetes Secret
             - name: ROOT_ACCESS_KEY_ID
               valueFrom:
@@ -209,6 +223,18 @@ spec:
               mountPath: /mnt/data
               subPath: data
               readOnly: false
+            {{- if .Values.gateway.backend.sidecarDir }}
+            - name: data
+              mountPath: {{ .Values.gateway.backend.sidecarDir }}
+              subPath: metadata
+              readOnly: false
+            {{- end }}
+            {{- if .Values.gateway.backend.versioningDir }}
+            - name: data
+              mountPath: {{ .Values.gateway.backend.versioningDir }}
+              subPath: versioning
+              readOnly: false
+            {{- end }}
             - name: data
               mountPath: /mnt/iam
               subPath: iam
diff --git a/chart/values.yaml b/chart/values.yaml
index ead05442..93800f89 100644
--- a/chart/values.yaml
+++ b/chart/values.yaml
@@ -133,10 +133,20 @@ gateway:
     type: posix
     # Additional arguments passed to the backend
     args: "/mnt/data"
+    # Optional directory for POSIX sidecar metadata storage. When set, the chart
+    # mounts this path from persistent storage and exports VGW_META_SIDECAR.
+    sidecarDir: ""
+    # Optional directory for POSIX or ScoutFS object version storage. When set,
+    # the chart mounts this path from persistent storage and exports VGW_VERSIONING_DIR.
+    versioningDir: ""
     # for s3 backend:
     # args: "--access 0123456 --secret 0xdeadbeef --endpoint http://s3.example.com"
     # for azure backend:
     # args: ""--account 0123456 --access-key 0xdeadbeef"
+    # for posix backend with sidecar metadata:
+    # sidecarDir: "/mnt/metadata"
+    # for posix or scoutfs backend with object versioning:
+    # versioningDir: "/mnt/versioning"
 
   # The port versitygw listens on for S3 API requests.
   port: 7070