From dc3392c11d27f9a0e0d3d6c4c8147dde8fb38ba0 Mon Sep 17 00:00:00 2001
From: Fabio Manganiello <fabio@manganiello.tech>
Date: Sun, 23 Apr 2023 22:25:24 +0200
Subject: [PATCH] Disk I/O stats are not always available and should therefore
 be optional.

---
 platypush/plugins/system/__init__.py     |  2 +-
 platypush/schemas/system/_disk/_model.py | 14 +++++++-------
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/platypush/plugins/system/__init__.py b/platypush/plugins/system/__init__.py
index 1bb1a24299..0b2c06a1c3 100644
--- a/platypush/plugins/system/__init__.py
+++ b/platypush/plugins/system/__init__.py
@@ -240,7 +240,7 @@ class SystemPlugin(SensorPlugin, EntityManager):
             [
                 {
                     **info,
-                    **io_stats[part],
+                    **io_stats.get(part, {}),
                     **usage[part],
                 }
                 for part, info in parts.items()
diff --git a/platypush/schemas/system/_disk/_model.py b/platypush/schemas/system/_disk/_model.py
index c87c194dd4..822ec99837 100644
--- a/platypush/schemas/system/_disk/_model.py
+++ b/platypush/schemas/system/_disk/_model.py
@@ -70,7 +70,7 @@ class Disk:
         }
     )
 
-    read_count: int = field(
+    read_count: Optional[int] = field(
         metadata={
             'metadata': {
                 'description': 'Number of recorded read operations',
@@ -78,7 +78,7 @@ class Disk:
         }
     )
 
-    write_count: int = field(
+    write_count: Optional[int] = field(
         metadata={
             'metadata': {
                 'description': 'Number of recorded write operations',
@@ -86,7 +86,7 @@ class Disk:
         }
     )
 
-    read_bytes: int = field(
+    read_bytes: Optional[int] = field(
         metadata={
             'metadata': {
                 'description': 'Number of read bytes',
@@ -94,7 +94,7 @@ class Disk:
         }
     )
 
-    write_bytes: int = field(
+    write_bytes: Optional[int] = field(
         metadata={
             'metadata': {
                 'description': 'Number of written bytes',
@@ -102,7 +102,7 @@ class Disk:
         }
     )
 
-    read_time: float = field(
+    read_time: Optional[float] = field(
         metadata={
             'metadata': {
                 'description': 'Time spent reading, in seconds',
@@ -110,7 +110,7 @@ class Disk:
         }
     )
 
-    write_time: float = field(
+    write_time: Optional[float] = field(
         metadata={
             'metadata': {
                 'description': 'Time spent writing, in seconds',
@@ -118,7 +118,7 @@ class Disk:
         }
     )
 
-    busy_time: float = field(
+    busy_time: Optional[float] = field(
         metadata={
             'metadata': {
                 'description': 'Total disk busy time, in seconds',