Fix slot discovery for bare numeric sysfs directories

services/enclosure.py

@@ -71,12 +71,13 @@ def list_slots(enclosure_id: str) -> list[dict]:
 
     slots = []
     for entry in sorted(enc_dir.iterdir()):
-        # Slot entries are directories like "Slot 00", "Slot 01", etc.
-        # Some enclosures use "Disk" or "ArrayDevice" prefixes.
         if not entry.is_dir():
             continue
-        name = entry.name
-        slot_num = _parse_slot_number(name)
+
+        # Determine if this is a drive slot element.
+        # Some enclosures use named dirs ("Slot 00", "Disk 1", "ArrayDevice00"),
+        # others use bare numeric dirs ("0", "1", "2") with a "type" file.
+        slot_num = _parse_slot_number(entry)
         if slot_num is None:
             continue
 
@@ -93,7 +94,7 @@ def list_slots(enclosure_id: str) -> list[dict]:
         else:
             # Also check the 'status' file — "not installed" means empty
             status = _read_sysfs(entry / "status")
-            if status and status != "not installed":
+            if status and status not in ("not installed", ""):
                 populated = True
 
         slots.append({
@@ -105,9 +106,27 @@ def list_slots(enclosure_id: str) -> list[dict]:
     return slots
 
 
-def _parse_slot_number(name: str) -> int | None:
-    """Extract the slot number from a sysfs slot directory name."""
-    # Handles "Slot 00", "Slot00", "Disk 1", "ArrayDevice00", etc.
+def _parse_slot_number(entry: Path) -> int | None:
+    """Extract the slot number from a sysfs slot directory.
+
+    Handles multiple naming conventions:
+    - Bare numeric dirs ("0", "1") with type=device and a slot file
+    - Named dirs ("Slot 00", "Slot00", "Disk 1", "ArrayDevice00")
+    """
+    name = entry.name
+
+    # Bare numeric directory — check the type file to confirm it's a device slot
+    if name.isdigit():
+        entry_type = _read_sysfs(entry / "type")
+        if entry_type not in ("device", "disk"):
+            return None
+        # Prefer the 'slot' file for the actual slot number
+        slot_val = _read_sysfs(entry / "slot")
+        if slot_val.isdigit():
+            return int(slot_val)
+        return int(name)
+
+    # Named directory prefixes
     for prefix in ("Slot ", "Slot", "Disk ", "Disk", "ArrayDevice", "SLOT "):
         if name.startswith(prefix):
             num_str = name[len(prefix):].strip()