Add disk wear monitoring and fix storage overflow display

- Add disk wear percentage collection from SMART data in backup script
- Add backup_disk_wear_percent metric to backup collector with thresholds
- Display wear percentage in backup widget disk section
- Fix storage section overflow handling to use consistent "X more below" logic
- Update maintenance mode to return pending status instead of unknown

Cargo.lock

@@ -279,7 +279,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.95"
+version = "0.1.96"
 dependencies = [
  "anyhow",
  "chrono",
@@ -301,7 +301,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.95"
+version = "0.1.96"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -324,7 +324,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.95"
+version = "0.1.96"
 dependencies = [
  "chrono",
  "serde",

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.96"
+version = "0.1.97"
 edition = "2021"
 
 [dependencies]

agent/src/collectors/backup.rs

@@ -25,6 +25,25 @@ impl BackupCollector {
     }
 
     async fn read_backup_status(&self) -> Result<Option<BackupStatusToml>, CollectorError> {
+        // Check if we're in maintenance mode
+        if std::fs::metadata("/tmp/cm-maintenance").is_ok() {
+            // Return special maintenance mode status
+            let maintenance_status = BackupStatusToml {
+                backup_name: "maintenance".to_string(),
+                start_time: chrono::Utc::now().format("%Y-%m-%d %H:%M:%S UTC").to_string(),
+                current_time: chrono::Utc::now().format("%Y-%m-%d %H:%M:%S UTC").to_string(),
+                duration_seconds: 0,
+                status: "pending".to_string(),
+                last_updated: chrono::Utc::now().format("%Y-%m-%d %H:%M:%S UTC").to_string(),
+                disk_space: None,
+                disk_product_name: None,
+                disk_serial_number: None,
+                disk_wear_percent: None,
+                services: HashMap::new(),
+            };
+            return Ok(Some(maintenance_status));
+        }
+
         // Check if backup status file exists
         if !std::path::Path::new(&self.backup_status_file).exists() {
             return Ok(None); // File doesn't exist, but this is not an error
@@ -79,7 +98,9 @@ impl BackupCollector {
                 }
             }
             "failed" => Status::Critical,
+            "warning" => Status::Warning, // Backup completed with warnings
             "running" => Status::Ok, // Currently running is OK
+            "pending" => Status::Pending, // Maintenance mode or backup starting
             _ => Status::Unknown,
         }
     }
@@ -379,6 +400,25 @@ impl Collector for BackupCollector {
             });
         }
 
+        if let Some(wear_percent) = backup_status.disk_wear_percent {
+            let wear_status = if wear_percent >= 90.0 {
+                Status::Critical
+            } else if wear_percent >= 75.0 {
+                Status::Warning
+            } else {
+                Status::Ok
+            };
+            
+            metrics.push(Metric {
+                name: "backup_disk_wear_percent".to_string(),
+                value: MetricValue::Float(wear_percent),
+                status: wear_status,
+                timestamp,
+                description: Some("Backup disk wear percentage from SMART data".to_string()),
+                unit: Some("percent".to_string()),
+            });
+        }
+
         // Count services by status
         let mut status_counts = HashMap::new();
         for service in backup_status.services.values() {
@@ -412,6 +452,7 @@ pub struct BackupStatusToml {
     pub disk_space: Option<DiskSpace>,
     pub disk_product_name: Option<String>,
     pub disk_serial_number: Option<String>,
+    pub disk_wear_percent: Option<f32>,
     pub services: HashMap<String, ServiceStatus>,
 }
 

dashboard/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.96"
+version = "0.1.97"
 edition = "2021"
 
 [dependencies]

dashboard/src/ui/mod.rs

@@ -678,7 +678,7 @@ impl TuiApp {
                 Status::Pending => ok_count += 1, // Treat pending as OK for aggregation
                 Status::Ok => ok_count += 1,
                 Status::Inactive => ok_count += 1, // Treat inactive as OK for aggregation
-                Status::Unknown => {}, // Ignore unknown for aggregation
+                Status::Unknown => ok_count += 1, // Treat unknown as OK for aggregation
                 Status::Offline => {}, // Ignore offline for aggregation
             }
         }

dashboard/src/ui/widgets/backup.rs

@@ -30,6 +30,8 @@ pub struct BackupWidget {
     backup_disk_product_name: Option<String>,
     /// Backup disk serial number from SMART data
     backup_disk_serial_number: Option<String>,
+    /// Backup disk wear percentage from SMART data
+    backup_disk_wear_percent: Option<f32>,
     /// Backup disk filesystem label
     backup_disk_filesystem_label: Option<String>,
     /// Number of completed services
@@ -65,6 +67,7 @@ impl BackupWidget {
             backup_disk_used_gb: None,
             backup_disk_product_name: None,
             backup_disk_serial_number: None,
+            backup_disk_wear_percent: None,
             backup_disk_filesystem_label: None,
             services_completed_count: None,
             services_failed_count: None,
@@ -197,6 +200,9 @@ impl Widget for BackupWidget {
                 "backup_disk_serial_number" => {
                     self.backup_disk_serial_number = Some(metric.value.as_string());
                 }
+                "backup_disk_wear_percent" => {
+                    self.backup_disk_wear_percent = metric.value.as_f32();
+                }
                 "backup_disk_filesystem_label" => {
                     self.backup_disk_filesystem_label = Some(metric.value.as_string());
                 }
@@ -328,21 +334,31 @@ impl BackupWidget {
             );
             lines.push(ratatui::text::Line::from(disk_spans));
 
-            // Serial number as sub-item
+            // Collect sub-items to determine tree structure
+            let mut sub_items = Vec::new();
+            
             if let Some(serial) = &self.backup_disk_serial_number {
-                lines.push(ratatui::text::Line::from(vec![
-                    ratatui::text::Span::styled("  ├─ ", Typography::tree()),
-                    ratatui::text::Span::styled(format!("S/N: {}", serial), Typography::secondary())
-                ]));
+                sub_items.push(format!("S/N: {}", serial));
+            }
+            
+            if let Some(wear) = self.backup_disk_wear_percent {
+                sub_items.push(format!("Wear: {:.0}%", wear));
             }
             
-            // Usage as sub-item
             if let (Some(used), Some(total)) = (self.backup_disk_used_gb, self.backup_disk_total_gb) {
                 let used_str = Self::format_size_with_proper_units(used);
                 let total_str = Self::format_size_with_proper_units(total);
+                sub_items.push(format!("Usage: {}/{}", used_str, total_str));
+            }
+            
+            // Render sub-items with proper tree structure
+            let num_items = sub_items.len();
+            for (i, item) in sub_items.into_iter().enumerate() {
+                let is_last = i == num_items - 1;
+                let tree_char = if is_last { "  └─ " } else { "  ├─ " };
                 lines.push(ratatui::text::Line::from(vec![
-                    ratatui::text::Span::styled("  └─ ", Typography::tree()),
-                    ratatui::text::Span::styled(format!("Usage: {}/{}", used_str, total_str), Typography::secondary())
+                    ratatui::text::Span::styled(tree_char, Typography::tree()),
+                    ratatui::text::Span::styled(item, Typography::secondary())
                 ]));
             }
         }

dashboard/src/ui/widgets/system.rs

@@ -513,48 +513,9 @@ impl SystemWidget {
             Span::styled("Storage:", Typography::widget_title())
         ]));
         
-        // Storage items with overflow handling
+        // Storage items - let main overflow logic handle truncation
         let storage_lines = self.render_storage();
-        let remaining_space = area.height.saturating_sub(lines.len() as u16);
-        
-        if storage_lines.len() <= remaining_space as usize {
-            // All storage lines fit
         lines.extend(storage_lines);
-        } else if remaining_space >= 2 {
-            // Show what we can and add overflow indicator
-            let lines_to_show = (remaining_space - 1) as usize; // Reserve 1 line for overflow
-            lines.extend(storage_lines.iter().take(lines_to_show).cloned());
-            
-            // Count hidden pools
-            let mut hidden_pools = 0;
-            let mut current_pool = String::new();
-            for (i, line) in storage_lines.iter().enumerate() {
-                if i >= lines_to_show {
-                    // Check if this line represents a new pool (no indentation)
-                    if let Some(first_span) = line.spans.first() {
-                        let text = first_span.content.as_ref();
-                        if !text.starts_with("  ") && text.contains(':') {
-                            let pool_name = text.split(':').next().unwrap_or("").trim();
-                            if pool_name != current_pool {
-                                hidden_pools += 1;
-                                current_pool = pool_name.to_string();
-                            }
-                        }
-                    }
-                }
-            }
-            
-            if hidden_pools > 0 {
-                let overflow_text = format!(
-                    "... and {} more pool{}",
-                    hidden_pools,
-                    if hidden_pools == 1 { "" } else { "s" }
-                );
-                lines.push(Line::from(vec![
-                    Span::styled(overflow_text, Typography::muted())
-                ]));
-            }
-        }
 
         // Apply scroll offset
         let total_lines = lines.len();

shared/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-shared"
-version = "0.1.96"
+version = "0.1.97"
 edition = "2021"
 
 [dependencies]