diff --git a/ocaml/idl/datamodel.ml b/ocaml/idl/datamodel.ml
index 4d4edd972ac..0a0d9677ee6 100644
--- a/ocaml/idl/datamodel.ml
+++ b/ocaml/idl/datamodel.ml
@@ -2791,12 +2791,21 @@ module Sr_stat = struct
       , [
           ("healthy", "Storage is fully available")
         ; ("recovering", "Storage is busy recovering, e.g. rebuilding mirrors.")
+        ; ("unreachable", "Storage is unreachable")
+        ; ("unavailable", "Storage is unavailable")
         ]
       )
 
   let t =
     let lifecycle =
-      [(Prototyped, rel_kolkata, ""); (Published, rel_lima, "")]
+      [
+        (Prototyped, rel_kolkata, "")
+      ; (Published, rel_lima, "")
+      ; ( Extended
+        , "24.16.0"
+        , "Enum extended with 'unreachable' and 'unavailable' values"
+        )
+      ]
     in
     create_obj ~in_db:false ~persist:PersistNothing
       ~gen_constructor_destructor:false ~lifecycle ~in_oss_since:None
diff --git a/ocaml/idl/datamodel_common.ml b/ocaml/idl/datamodel_common.ml
index fc13fb0a7b1..64e3481dc21 100644
--- a/ocaml/idl/datamodel_common.ml
+++ b/ocaml/idl/datamodel_common.ml
@@ -10,7 +10,7 @@ open Datamodel_roles
               to leave a gap for potential hotfixes needing to increment the schema version.*)
 let schema_major_vsn = 5
 
-let schema_minor_vsn = 776
+let schema_minor_vsn = 778
 
 (* Historical schema versions just in case this is useful later *)
 let rio_schema_major_vsn = 5
diff --git a/ocaml/idl/schematest.ml b/ocaml/idl/schematest.ml
index def14e58160..d578006c4e0 100644
--- a/ocaml/idl/schematest.ml
+++ b/ocaml/idl/schematest.ml
@@ -3,7 +3,7 @@ let hash x = Digest.string x |> Digest.to_hex
 (* BEWARE: if this changes, check that schema has been bumped accordingly in
    ocaml/idl/datamodel_common.ml, usually schema_minor_vsn *)
 
-let last_known_schema_hash = "2b8b5b107eb465e97d35a68274ac18ef"
+let last_known_schema_hash = "b24c445c4f9c3e7f63caf45705865fc8"
 
 let current_schema_hash : string =
   let open Datamodel_types in
diff --git a/ocaml/xapi-cli-server/cli_operations.ml b/ocaml/xapi-cli-server/cli_operations.ml
index 4208a8a0617..4f2485e1cb3 100644
--- a/ocaml/xapi-cli-server/cli_operations.ml
+++ b/ocaml/xapi-cli-server/cli_operations.ml
@@ -2566,6 +2566,10 @@ let sr_probe_ext printer rpc session_id params =
           "healthy"
       | `recovering ->
           "recovering"
+      | `unreachable ->
+          "unreachable"
+      | `unavailable ->
+          "unavailable"
     in
     (match x.API.sr_stat_uuid with Some uuid -> [("uuid", uuid)] | None -> [])
     @ [
diff --git a/ocaml/xapi-idl/storage/storage_interface.ml b/ocaml/xapi-idl/storage/storage_interface.ml
index 5ce6006abb0..698997ac0cd 100644
--- a/ocaml/xapi-idl/storage/storage_interface.ml
+++ b/ocaml/xapi-idl/storage/storage_interface.ml
@@ -232,7 +232,8 @@ let default_vdi_info =
   | Error (`Msg m) ->
       failwith (Printf.sprintf "Error creating default_vdi_info: %s" m)
 
-type sr_health = Healthy | Recovering [@@deriving rpcty]
+type sr_health = Healthy | Recovering | Unreachable | Unavailable
+[@@deriving rpcty]
 
 type sr_info = {
     sr_uuid: string option
diff --git a/ocaml/xapi/xapi_sr.ml b/ocaml/xapi/xapi_sr.ml
index f692f524050..18cba6800aa 100644
--- a/ocaml/xapi/xapi_sr.ml
+++ b/ocaml/xapi/xapi_sr.ml
@@ -299,7 +299,15 @@ let probe =
 let probe_ext =
   let to_xenapi_sr_health =
     let open Storage_interface in
-    function Healthy -> `healthy | Recovering -> `recovering
+    function
+    | Healthy ->
+        `healthy
+    | Recovering ->
+        `recovering
+    | Unreachable ->
+        `unreachable
+    | Unavailable ->
+        `unavailable
   in
   let to_xenapi_sr_stat
       Storage_interface.