diff --git a/config.yaml b/config.yaml
index 2af23ec..29cb743 100644
--- a/config.yaml
+++ b/config.yaml
@@ -206,3 +206,7 @@ options:
     description: |
       Encrypt block devices used by swift using dm-crypt, making use of
       vault for encryption key management; requires a relation to vault.
+  xfs-inode-size:
+    default: 512
+    type: int
+    description: XFS inode size to use for block devices.
diff --git a/lib/swift_storage_utils.py b/lib/swift_storage_utils.py
index 8d9d063..7e4bae5 100644
--- a/lib/swift_storage_utils.py
+++ b/lib/swift_storage_utils.py
@@ -522,7 +522,7 @@ def setup_storage(encrypt=False):
 
         try:
             # If not cleaned and in use, mkfs should fail.
-            mkfs_xfs(dev, force=reformat)
+            mkfs_xfs(dev, force=reformat, inode_size=config('xfs-inode-size'))
         except subprocess.CalledProcessError as exc:
             # This is expected is a formatted device is provided and we are
             # forcing the format.