diff --git a/.github/workflows/helm_ci.yml b/.github/workflows/helm_ci.yml
index 98e993405e..10be17ac09 100644
--- a/.github/workflows/helm_ci.yml
+++ b/.github/workflows/helm_ci.yml
@@ -1328,6 +1328,67 @@ jobs:
           echo "$BOOL_FALSE" | grep -q -- '-status Suspended' || { echo "FAIL: bool false versioning did not Suspend the bucket"; exit 1; }
           echo "Bucket versioning: YAML bool false suspends consistently with string \"false\""
 
+          echo "=== Testing bucket ttl, replication and disk in one fs.configure ==="
+          FS_CONFIGURE=$(helm template test $CHART_DIR \
+            --set s3.enabled=true \
+            --set s3.createBuckets[0].name=cfgbucket \
+            --set s3.createBuckets[0].ttl=7d \
+            --set-string s3.createBuckets[0].replication=001 \
+            --set s3.createBuckets[0].disk=ssd | grep 'fs.configure -locationPrefix=/buckets/cfgbucket/' || true)
+          echo "$FS_CONFIGURE" | grep -q -- '-ttl=7d -replication=001 -disk=ssd -apply' || { echo "FAIL: bucket fs.configure missing ttl/replication/disk: $FS_CONFIGURE"; exit 1; }
+          echo "Bucket fs.configure: ttl, replication and disk render together"
+
+          FS_CONFIGURE=$(helm template test $CHART_DIR \
+            --set s3.enabled=true \
+            --set s3.createBuckets[0].name=replbucket \
+            --set-string s3.createBuckets[0].replication=002 | grep 'fs.configure -locationPrefix=/buckets/replbucket/' || true)
+          echo "$FS_CONFIGURE" | grep -q -- '/buckets/replbucket/ -replication=002 -apply' || { echo "FAIL: replication-only bucket did not render fs.configure: $FS_CONFIGURE"; exit 1; }
+          echo "Bucket fs.configure: replication without ttl"
+
+          FS_CONFIGURE=$(helm template test $CHART_DIR \
+            --set s3.enabled=true \
+            --set s3.createBuckets[0].name=diskbucket \
+            --set s3.createBuckets[0].disk=ssd | grep 'fs.configure -locationPrefix=/buckets/diskbucket/' || true)
+          echo "$FS_CONFIGURE" | grep -q -- '/buckets/diskbucket/ -disk=ssd -apply' || { echo "FAIL: disk-only bucket did not render fs.configure: $FS_CONFIGURE"; exit 1; }
+          echo "Bucket fs.configure: disk without ttl"
+
+          if helm template test $CHART_DIR \
+            --set s3.enabled=true \
+            --set s3.createBuckets[0].name=numbucket \
+            --set s3.createBuckets[0].replication=0 >/dev/null 2>&1; then
+            echo "FAIL: a numeric replication should fail to render"; exit 1
+          fi
+          echo "Bucket fs.configure: numeric replication is rejected"
+
+          if helm template test $CHART_DIR \
+            --set s3.enabled=true \
+            --set s3.createBuckets[0].name=badbucket \
+            --set-string s3.createBuckets[0].replication=00O >/dev/null 2>&1; then
+            echo "FAIL: a non-digit replication should fail to render"; exit 1
+          fi
+          echo "Bucket fs.configure: non-digit replication is rejected"
+
+          if helm template test $CHART_DIR \
+            --set s3.enabled=true \
+            --set s3.createBuckets[0].name=bigbucket \
+            --set-string s3.createBuckets[0].replication=256 >/dev/null 2>&1; then
+            echo "FAIL: a replication above 255 should fail to render"; exit 1
+          fi
+          FS_CONFIGURE=$(helm template test $CHART_DIR \
+            --set s3.enabled=true \
+            --set s3.createBuckets[0].name=maxbucket \
+            --set-string s3.createBuckets[0].replication=255 | grep 'fs.configure -locationPrefix=/buckets/maxbucket/' || true)
+          echo "$FS_CONFIGURE" | grep -q -- '/buckets/maxbucket/ -replication=255 -apply' || { echo "FAIL: replication 255 should render: $FS_CONFIGURE"; exit 1; }
+          echo "Bucket fs.configure: replication is limited to 000-255"
+
+          FS_CONFIGURE=$(helm template test $CHART_DIR \
+            --set s3.enabled=true \
+            --set s3.createBuckets[0].name=nullbucket \
+            --set s3.createBuckets[0].ttl=7d \
+            --set s3.createBuckets[0].replication=null | grep 'fs.configure -locationPrefix=/buckets/nullbucket/' || true)
+          echo "$FS_CONFIGURE" | grep -q -- '/buckets/nullbucket/ -ttl=7d -apply' || { echo "FAIL: null replication should be treated as unset: $FS_CONFIGURE"; exit 1; }
+          echo "Bucket fs.configure: null replication is unset"
+
           echo ""
           echo "=== Testing hook Job labels ==="
           # The hook Jobs were the only pods in the chart without the standard
diff --git a/k8s/charts/seaweedfs/templates/shared/post-install-bucket-hook.yaml b/k8s/charts/seaweedfs/templates/shared/post-install-bucket-hook.yaml
index 2a88b6018d..6a4bc2535c 100644
--- a/k8s/charts/seaweedfs/templates/shared/post-install-bucket-hook.yaml
+++ b/k8s/charts/seaweedfs/templates/shared/post-install-bucket-hook.yaml
@@ -215,8 +215,11 @@ spec:
           {{- end }}
           {{- end }}
           {{- range $createBuckets }}
-          {{- if .ttl }}
-            /bin/echo 'fs.configure -locationPrefix={{ $bucketsFolder }}/{{ .name }}/ -ttl={{ .ttl }} -apply' | /usr/bin/weed shell
+          {{- if not (or (kindIs "invalid" .replication) (and (kindIs "string" .replication) (or (eq .replication "") (regexMatch "^([01][0-9]{2}|2[0-4][0-9]|25[0-5])$" .replication)))) }}
+          {{- fail (printf "createBuckets %s: replication must be a quoted three-digit string from 000 to 255 such as \"001\" (use --set-string)" .name) }}
+          {{- end }}
+          {{- if or .ttl .replication .disk }}
+            /bin/echo 'fs.configure -locationPrefix={{ $bucketsFolder }}/{{ .name }}/{{- with .ttl }} -ttl={{ . }}{{- end }}{{- with .replication }} -replication={{ . }}{{- end }}{{- with .disk }} -disk={{ . }}{{- end }} -apply' | /usr/bin/weed shell
           {{- end }}
           {{- end }}
           {{- range $createBuckets }}
diff --git a/k8s/charts/seaweedfs/values.yaml b/k8s/charts/seaweedfs/values.yaml
index 0ba8072314..9f7e31be5f 100644
--- a/k8s/charts/seaweedfs/values.yaml
+++ b/k8s/charts/seaweedfs/values.yaml
@@ -1083,12 +1083,16 @@ filer:
     # You may specify buckets to be created during the install or upgrade process.
     # Buckets may be exposed publicly by setting `anonymousRead` to `true`
     # ttl format: [1-255][m|h|d|w|M|y] (e.g., 7d)
+    # replication (e.g., 001) and disk (e.g., ssd) apply to writes into the bucket
+    # removing ttl, replication or disk later keeps the stored rule; set a new value instead
     # objectLock enables S3 Object Lock (irreversible, forces versioning)
     # versioning: Enabled or Suspended (or bool true/false)
     # createBuckets:
     #   - name: bucket-a
     #     anonymousRead: true
     #     ttl: 7d
+    #     replication: "001"
+    #     disk: ssd
     #     objectLock: true
     #     versioning: Enabled
     #   - name: bucket-b
@@ -1165,12 +1169,16 @@ s3:
   # You may specify buckets to be created during the install or upgrade process.
   # Buckets may be exposed publicly by setting `anonymousRead` to `true`
   # ttl format: [1-255][m|h|d|w|M|y] (e.g., 7d)
+  # replication (e.g., 001) and disk (e.g., ssd) apply to writes into the bucket
+  # removing ttl, replication or disk later keeps the stored rule; set a new value instead
   # objectLock enables S3 Object Lock (irreversible, forces versioning)
   # versioning: Enabled or Suspended (or bool true/false)
   # createBuckets:
   #   - name: bucket-a
   #     anonymousRead: true
   #     ttl: 7d
+  #     replication: "001"
+  #     disk: ssd
   #     objectLock: true
   #     versioning: Enabled
   #   - name: bucket-b
@@ -2007,12 +2015,16 @@ allInOne:
     # You may specify buckets to be created during the install process.
     # Buckets may be exposed publicly by setting `anonymousRead` to `true`
     # ttl format: [1-255][m|h|d|w|M|y] (e.g., 7d)
+    # replication (e.g., 001) and disk (e.g., ssd) apply to writes into the bucket
+    # removing ttl, replication or disk later keeps the stored rule; set a new value instead
     # objectLock enables S3 Object Lock (irreversible, forces versioning)
     # versioning: Enabled or Suspended (or bool true/false)
     # createBuckets:
     #   - name: bucket-a
     #     anonymousRead: true
     #     ttl: 7d
+    #     replication: "001"
+    #     disk: ssd
     #     objectLock: true
     #     versioning: Enabled
     #   - name: bucket-b