Implement enhanced storage pool visualization

- Add support for mergerfs pool grouping with data and parity disk separation
- Implement pool health monitoring (healthy/degraded/critical status)
- Create hierarchical tree view for multi-disk storage arrays
- Add automatic pool type detection and member disk association
- Maintain backward compatibility for single disk configurations
- Support future extension for RAID and ZFS pool types

Cargo.lock

@@ -279,7 +279,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.93"
+version = "0.1.98"
 dependencies = [
  "anyhow",
  "chrono",
@@ -301,7 +301,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.93"
+version = "0.1.98"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -324,7 +324,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.93"
+version = "0.1.98"
 dependencies = [
  "chrono",
  "serde",

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.94"
+version = "0.1.99"
 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>,
 }
 

agent/src/collectors/disk.rs

@@ -15,12 +15,45 @@ struct StoragePool {
     name: String,            // e.g., "steampool", "root"
     mount_point: String,     // e.g., "/mnt/steampool", "/"
     filesystem: String,      // e.g., "mergerfs", "ext4", "zfs", "btrfs"
-    storage_type: String,    // e.g., "mergerfs", "single", "raid", "zfs"
+    pool_type: StoragePoolType, // Enhanced pool type with configuration
     size: String,            // e.g., "2.5TB"
     used: String,            // e.g., "2.1TB"
     available: String,       // e.g., "400GB"
     usage_percent: f32,      // e.g., 85.0
     underlying_drives: Vec<DriveInfo>, // Individual physical drives
+    pool_health: PoolHealth, // Overall pool health status
+}
+
+/// Enhanced storage pool types with specific configurations
+#[derive(Debug, Clone)]
+enum StoragePoolType {
+    Single,                    // Traditional single disk
+    MergerfsPool {            // MergerFS with optional parity
+        data_disks: Vec<String>,      // Member disk names (sdb, sdd)
+        parity_disks: Vec<String>,    // Parity disk names (sdc)
+    },
+    #[allow(dead_code)]
+    RaidArray {               // Hardware RAID (future)
+        level: String,               // "RAID1", "RAID5", etc.
+        member_disks: Vec<String>,   
+        spare_disks: Vec<String>,
+    },
+    #[allow(dead_code)]
+    ZfsPool {                 // ZFS pool (future)
+        pool_name: String,
+        vdevs: Vec<String>,
+    }
+}
+
+/// Pool health status for redundant storage
+#[derive(Debug, Clone, Copy, PartialEq)]
+enum PoolHealth {
+    Healthy,           // All drives OK, parity current
+    Degraded,          // One drive failed or parity outdated, still functional
+    Critical,          // Multiple failures, data at risk
+    #[allow(dead_code)]
+    Rebuilding,        // Actively rebuilding/scrubbing (future: SnapRAID status integration)
+    Unknown,           // Cannot determine status
 }
 
 /// Information about an individual physical drive
@@ -75,12 +108,39 @@ impl DiskCollector {
     /// Get configured storage pools with individual drive information
     fn get_configured_storage_pools(&self) -> Result<Vec<StoragePool>> {
         let mut storage_pools = Vec::new();
+        let mut processed_pools = std::collections::HashSet::new();
 
+        // First pass: Create enhanced pools (mergerfs, etc.)
         for fs_config in &self.config.filesystems {
             if !fs_config.monitor {
                 continue;
             }
 
+            let (pool_type, skip_in_single_mode) = self.determine_pool_type(&fs_config.storage_type);
+            
+            // Skip member disks if they're part of a pool
+            if skip_in_single_mode {
+                continue;
+            }
+
+            // Check if this pool was already processed (in case of multiple member disks)
+            let pool_key = match &pool_type {
+                StoragePoolType::MergerfsPool { .. } => {
+                    // For mergerfs pools, use the main mount point
+                    if fs_config.fs_type == "fuse.mergerfs" {
+                        fs_config.mount_point.clone()
+                    } else {
+                        continue; // Skip member disks
+                    }
+                }
+                _ => fs_config.mount_point.clone()
+            };
+
+            if processed_pools.contains(&pool_key) {
+                continue;
+            }
+            processed_pools.insert(pool_key.clone());
+
             // Get filesystem stats for the mount point
             match self.get_filesystem_info(&fs_config.mount_point) {
                 Ok((total_bytes, used_bytes)) => {
@@ -96,25 +156,29 @@ impl DiskCollector {
                     let used = self.bytes_to_human_readable(used_bytes);
                     let available = self.bytes_to_human_readable(available_bytes);
 
-                    // Get individual drive information using pre-detected devices
-                    let device_names = self.detected_devices.get(&fs_config.mount_point).cloned().unwrap_or_default();
-                    let underlying_drives = self.get_drive_info_for_devices(&device_names)?;
+                    // Get underlying drives based on pool type
+                    let underlying_drives = self.get_pool_drives(&pool_type, &fs_config.mount_point)?;
+                    
+                    // Calculate pool health
+                    let pool_health = self.calculate_pool_health(&pool_type, &underlying_drives);
+                    let drive_count = underlying_drives.len();
 
                     storage_pools.push(StoragePool {
                         name: fs_config.name.clone(),
                         mount_point: fs_config.mount_point.clone(),
                         filesystem: fs_config.fs_type.clone(),
-                        storage_type: fs_config.storage_type.clone(),
+                        pool_type: pool_type.clone(),
                         size,
                         used,
                         available,
                         usage_percent: usage_percent as f32,
                         underlying_drives,
+                        pool_health,
                     });
 
                     debug!(
-                        "Storage pool '{}' ({}) at {} with {} detected drives",
-                        fs_config.name, fs_config.storage_type, fs_config.mount_point, device_names.len()
+                        "Storage pool '{}' ({:?}) at {} with {} drives, health: {:?}",
+                        fs_config.name, pool_type, fs_config.mount_point, drive_count, pool_health
                     );
                 }
                 Err(e) => {
@@ -129,6 +193,123 @@ impl DiskCollector {
         Ok(storage_pools)
     }
 
+    /// Determine the storage pool type from configuration
+    fn determine_pool_type(&self, storage_type: &str) -> (StoragePoolType, bool) {
+        match storage_type {
+            "single" => (StoragePoolType::Single, false),
+            "mergerfs_pool" | "mergerfs" => {
+                // Find associated member disks
+                let data_disks = self.find_pool_member_disks("mergerfs_member");
+                let parity_disks = self.find_pool_member_disks("parity");
+                (StoragePoolType::MergerfsPool { data_disks, parity_disks }, false)
+            }
+            "mergerfs_member" => (StoragePoolType::Single, true), // Skip, part of pool
+            "parity" => (StoragePoolType::Single, true), // Skip, part of pool  
+            "raid1" | "raid5" | "raid6" => {
+                let member_disks = self.find_pool_member_disks(&format!("{}_member", storage_type));
+                (StoragePoolType::RaidArray { 
+                    level: storage_type.to_uppercase(), 
+                    member_disks, 
+                    spare_disks: Vec::new() 
+                }, false)
+            }
+            _ => (StoragePoolType::Single, false) // Default to single
+        }
+    }
+
+    /// Find member disks for a specific storage type
+    fn find_pool_member_disks(&self, member_type: &str) -> Vec<String> {
+        let mut member_disks = Vec::new();
+        
+        for fs_config in &self.config.filesystems {
+            if fs_config.storage_type == member_type && fs_config.monitor {
+                // Get device names for this mount point
+                if let Some(devices) = self.detected_devices.get(&fs_config.mount_point) {
+                    member_disks.extend(devices.clone());
+                }
+            }
+        }
+        
+        member_disks
+    }
+
+    /// Get drive information for a specific pool type
+    fn get_pool_drives(&self, pool_type: &StoragePoolType, mount_point: &str) -> Result<Vec<DriveInfo>> {
+        match pool_type {
+            StoragePoolType::Single => {
+                // Single disk - use detected devices for this mount point
+                let device_names = self.detected_devices.get(mount_point).cloned().unwrap_or_default();
+                self.get_drive_info_for_devices(&device_names)
+            }
+            StoragePoolType::MergerfsPool { data_disks, parity_disks } => {
+                // Mergerfs pool - collect all member drives
+                let mut all_disks = data_disks.clone();
+                all_disks.extend(parity_disks.clone());
+                self.get_drive_info_for_devices(&all_disks)
+            }
+            StoragePoolType::RaidArray { member_disks, spare_disks, .. } => {
+                // RAID array - collect member and spare drives
+                let mut all_disks = member_disks.clone();
+                all_disks.extend(spare_disks.clone());
+                self.get_drive_info_for_devices(&all_disks)
+            }
+            StoragePoolType::ZfsPool { .. } => {
+                // ZFS pool - use detected devices (future implementation)
+                let device_names = self.detected_devices.get(mount_point).cloned().unwrap_or_default();
+                self.get_drive_info_for_devices(&device_names)
+            }
+        }
+    }
+
+    /// Calculate pool health based on drive status and pool type
+    fn calculate_pool_health(&self, pool_type: &StoragePoolType, drives: &[DriveInfo]) -> PoolHealth {
+        match pool_type {
+            StoragePoolType::Single => {
+                // Single disk - health is just the drive health
+                if drives.is_empty() {
+                    PoolHealth::Unknown
+                } else if drives.iter().all(|d| d.health_status == "PASSED") {
+                    PoolHealth::Healthy
+                } else {
+                    PoolHealth::Critical
+                }
+            }
+            StoragePoolType::MergerfsPool { data_disks, parity_disks } => {
+                let failed_data = drives.iter()
+                    .filter(|d| data_disks.contains(&d.device) && d.health_status != "PASSED")
+                    .count();
+                let failed_parity = drives.iter()
+                    .filter(|d| parity_disks.contains(&d.device) && d.health_status != "PASSED")
+                    .count();
+                
+                match (failed_data, failed_parity) {
+                    (0, 0) => PoolHealth::Healthy,
+                    (1, 0) => PoolHealth::Degraded,  // Can recover with parity
+                    (0, 1) => PoolHealth::Degraded,  // Lost parity protection
+                    _ => PoolHealth::Critical,       // Multiple failures
+                }
+            }
+            StoragePoolType::RaidArray { level, .. } => {
+                let failed_drives = drives.iter().filter(|d| d.health_status != "PASSED").count();
+                
+                // Basic RAID health logic (can be enhanced per RAID level)
+                match failed_drives {
+                    0 => PoolHealth::Healthy,
+                    1 if level.contains('1') || level.contains('5') || level.contains('6') => PoolHealth::Degraded,
+                    _ => PoolHealth::Critical,
+                }
+            }
+            StoragePoolType::ZfsPool { .. } => {
+                // ZFS health would require zpool status parsing (future)
+                if drives.iter().all(|d| d.health_status == "PASSED") {
+                    PoolHealth::Healthy
+                } else {
+                    PoolHealth::Degraded
+                }
+            }
+        }
+    }
+
     /// Get drive information for a list of device names
     fn get_drive_info_for_devices(&self, device_names: &[String]) -> Result<Vec<DriveInfo>> {
         let mut drives = Vec::new();
@@ -448,8 +629,8 @@ impl Collector for DiskCollector {
             let used_gb = self.parse_size_to_gb(&storage_pool.used);
             let avail_gb = self.parse_size_to_gb(&storage_pool.available);
 
-            // Calculate status based on configured thresholds
-            let pool_status = if storage_pool.usage_percent >= self.config.usage_critical_percent {
+            // Calculate status based on configured thresholds and pool health
+            let usage_status = if storage_pool.usage_percent >= self.config.usage_critical_percent {
                 Status::Critical
             } else if storage_pool.usage_percent >= self.config.usage_warning_percent {
                 Status::Warning
@@ -457,6 +638,14 @@ impl Collector for DiskCollector {
                 Status::Ok
             };
 
+            let pool_status = match storage_pool.pool_health {
+                PoolHealth::Critical => Status::Critical,
+                PoolHealth::Degraded => Status::Warning,
+                PoolHealth::Rebuilding => Status::Warning,
+                PoolHealth::Healthy => usage_status,
+                PoolHealth::Unknown => Status::Unknown,
+            };
+
             // Storage pool info metrics
             metrics.push(Metric {
                 name: format!("disk_{}_mount_point", pool_name),
@@ -476,15 +665,47 @@ impl Collector for DiskCollector {
                 timestamp,
             });
 
+            // Enhanced pool type information
+            let pool_type_str = match &storage_pool.pool_type {
+                StoragePoolType::Single => "single".to_string(),
+                StoragePoolType::MergerfsPool { data_disks, parity_disks } => {
+                    format!("mergerfs ({}+{})", data_disks.len(), parity_disks.len())
+                }
+                StoragePoolType::RaidArray { level, member_disks, spare_disks } => {
+                    format!("{} ({}+{})", level, member_disks.len(), spare_disks.len())
+                }
+                StoragePoolType::ZfsPool { pool_name, .. } => {
+                    format!("zfs ({})", pool_name)
+                }
+            };
+
             metrics.push(Metric {
-                name: format!("disk_{}_storage_type", pool_name),
-                value: MetricValue::String(storage_pool.storage_type.clone()),
+                name: format!("disk_{}_pool_type", pool_name),
+                value: MetricValue::String(pool_type_str.clone()),
                 unit: None,
-                description: Some(format!("Type: {}", storage_pool.storage_type)),
+                description: Some(format!("Type: {}", pool_type_str)),
                 status: Status::Ok,
                 timestamp,
             });
 
+            // Pool health status
+            let health_str = match storage_pool.pool_health {
+                PoolHealth::Healthy => "healthy",
+                PoolHealth::Degraded => "degraded", 
+                PoolHealth::Critical => "critical",
+                PoolHealth::Rebuilding => "rebuilding",
+                PoolHealth::Unknown => "unknown",
+            };
+
+            metrics.push(Metric {
+                name: format!("disk_{}_pool_health", pool_name),
+                value: MetricValue::String(health_str.to_string()),
+                unit: None,
+                description: Some(format!("Health: {}", health_str)),
+                status: pool_status,
+                timestamp,
+            });
+
             // Storage pool size metrics
             metrics.push(Metric {
                 name: format!("disk_{}_total_gb", pool_name),

dashboard/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.94"
+version = "0.1.99"
 edition = "2021"
 
 [dependencies]

dashboard/src/ui/mod.rs

@@ -589,12 +589,13 @@ impl TuiApp {
         // Split the title bar into left and right sections
         let chunks = Layout::default()
             .direction(Direction::Horizontal)
-            .constraints([Constraint::Length(15), Constraint::Min(0)])
+            .constraints([Constraint::Length(22), Constraint::Min(0)])
             .split(area);
 
-        // Left side: "cm-dashboard" text
+        // Left side: "cm-dashboard" text with version
+        let title_text = format!(" cm-dashboard v{}", env!("CARGO_PKG_VERSION"));
         let left_span = Span::styled(
-            " cm-dashboard", 
+            &title_text, 
             Style::default().fg(Theme::background()).bg(background_color).add_modifier(Modifier::BOLD)
         );
         let left_title = Paragraph::new(Line::from(vec![left_span]))
@@ -666,35 +667,27 @@ impl TuiApp {
             return host_summary_metric.status;
         }
 
-        // Fallback to old aggregation logic with proper Pending handling
+        // Rewritten status aggregation - only Critical, Warning, or OK for top bar
         let mut has_critical = false;
         let mut has_warning = false;
-        let mut has_pending = false;
-        let mut ok_count = 0;
 
         for metric in &metrics {
             match metric.status {
                 Status::Critical => has_critical = true,
                 Status::Warning => has_warning = true,
-                Status::Pending => has_pending = true,
-                Status::Ok => ok_count += 1,
-                Status::Inactive => ok_count += 1, // Treat inactive as OK for aggregation
-                Status::Unknown => {}, // Ignore unknown for aggregation
-                Status::Offline => {}, // Ignore offline for aggregation
+                // Treat all other statuses as OK for top bar aggregation
+                Status::Ok | Status::Pending | Status::Inactive | Status::Unknown => {},
+                Status::Offline => {}, // Ignore offline
             }
         }
 
-        // Priority order: Critical > Warning > Pending > Ok > Unknown
+        // Only return Critical, Warning, or OK - no other statuses
         if has_critical {
             Status::Critical
         } else if has_warning {
             Status::Warning
-        } else if has_pending {
-            Status::Pending
-        } else if ok_count > 0 {
-            Status::Ok
         } else {
-            Status::Unknown
+            Status::Ok
         }
     }
 

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));
             }
-
-            // Usage as sub-item
+            
+            if let Some(wear) = self.backup_disk_wear_percent {
+                sub_items.push(format!("Wear: {:.0}%", wear));
+            }
+            
             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

@@ -45,12 +45,14 @@ pub struct SystemWidget {
 struct StoragePool {
     name: String,
     mount_point: String,
-    pool_type: String, // "Single", "Raid0", etc.
+    pool_type: String, // "single", "mergerfs (2+1)", "RAID5 (3+1)", etc.
+    pool_health: Option<String>, // "healthy", "degraded", "critical", "rebuilding"
     drives: Vec<StorageDrive>,
     usage_percent: Option<f32>,
     used_gb: Option<f32>,
     total_gb: Option<f32>,
     status: Status,
+    health_status: Status, // Separate status for pool health vs usage
 }
 
 #[derive(Clone)]
@@ -155,12 +157,14 @@ impl SystemWidget {
                     let pool = pools.entry(pool_name.clone()).or_insert_with(|| StoragePool {
                         name: pool_name.clone(),
                         mount_point: mount_point.clone(),
-                        pool_type: "Single".to_string(), // Default, could be enhanced
+                        pool_type: "single".to_string(), // Default, will be updated
+                        pool_health: None,
                         drives: Vec::new(),
                         usage_percent: None,
                         used_gb: None,
                         total_gb: None,
                         status: Status::Unknown,
+                        health_status: Status::Unknown,
                     });
 
                     // Parse different metric types
@@ -177,6 +181,15 @@ impl SystemWidget {
                         if let MetricValue::Float(total) = metric.value {
                             pool.total_gb = Some(total);
                         }
+                    } else if metric.name.contains("_pool_type") {
+                        if let MetricValue::String(pool_type) = &metric.value {
+                            pool.pool_type = pool_type.clone();
+                        }
+                    } else if metric.name.contains("_pool_health") {
+                        if let MetricValue::String(health) = &metric.value {
+                            pool.pool_health = Some(health.clone());
+                            pool.health_status = metric.status.clone();
+                        }
                     } else if metric.name.contains("_temperature") {
                         if let Some(drive_name) = self.extract_drive_name(&metric.name) {
                             // Find existing drive or create new one
@@ -277,73 +290,149 @@ impl SystemWidget {
         None
     }
 
-    /// Render storage section with tree structure
+    /// Render storage section with enhanced tree structure
     fn render_storage(&self) -> Vec<Line<'_>> {
         let mut lines = Vec::new();
 
         for pool in &self.storage_pools {
-            // Pool header line
-            let usage_text = match (pool.usage_percent, pool.used_gb, pool.total_gb) {
-                (Some(pct), Some(used), Some(total)) => {
-                    format!("{:.0}% {:.1}GB/{:.1}GB", pct, used, total)
-                }
-                _ => "—% —GB/—GB".to_string(),
-            };
-            
-            let pool_label = if pool.pool_type.to_lowercase() == "single" {
+            // Pool header line with type and health
+            let pool_label = if pool.pool_type == "single" {
                 format!("{}:", pool.mount_point)
             } else {
                 format!("{} ({}):", pool.mount_point, pool.pool_type)
             };
             let pool_spans = StatusIcons::create_status_spans(
-                pool.status.clone(),
+                pool.health_status.clone(),
                 &pool_label
             );
             lines.push(Line::from(pool_spans));
 
-            // Drive lines with tree structure
-            let has_usage_line = pool.usage_percent.is_some();
-            for (i, drive) in pool.drives.iter().enumerate() {
-                let is_last_drive = i == pool.drives.len() - 1;
-                let tree_symbol = if is_last_drive && !has_usage_line { "└─" } else { "├─" };
-                
-                let mut drive_info = Vec::new();
-                if let Some(temp) = drive.temperature {
-                    drive_info.push(format!("T: {:.0}C", temp));
+            // Pool health line (for multi-disk pools)
+            if pool.pool_type != "single" {
+                if let Some(health) = &pool.pool_health {
+                    let health_text = match health.as_str() {
+                        "healthy" => format!("Pool Status: {} Healthy", 
+                            if pool.drives.len() > 1 { format!("({} drives)", pool.drives.len()) } else { String::new() }),
+                        "degraded" => "Pool Status: ⚠ Degraded".to_string(),
+                        "critical" => "Pool Status: ✗ Critical".to_string(), 
+                        "rebuilding" => "Pool Status: ⟳ Rebuilding".to_string(),
+                        _ => format!("Pool Status: ? {}", health),
+                    };
+                    
+                    let mut health_spans = vec![
+                        Span::raw("  "),
+                        Span::styled("├─ ", Typography::tree()),
+                    ];
+                    health_spans.extend(StatusIcons::create_status_spans(pool.health_status.clone(), &health_text));
+                    lines.push(Line::from(health_spans));
                 }
-                if let Some(wear) = drive.wear_percent {
-                    drive_info.push(format!("W: {:.0}%", wear));
-                }
-                let drive_text = if drive_info.is_empty() {
-                    drive.name.clone()
-                } else {
-                    format!("{} {}", drive.name, drive_info.join(" • "))
-                };
-
-                let mut drive_spans = vec![
-                    Span::raw("  "),
-                    Span::styled(tree_symbol, Typography::tree()),
-                    Span::raw(" "),
-                ];
-                drive_spans.extend(StatusIcons::create_status_spans(drive.status.clone(), &drive_text));
-                lines.push(Line::from(drive_spans));
             }
 
-            // Usage line
-            if pool.usage_percent.is_some() {
-                let tree_symbol = "└─";
-                let mut usage_spans = vec![
-                    Span::raw("  "),
-                    Span::styled(tree_symbol, Typography::tree()),
-                    Span::raw(" "),
-                ];
-                usage_spans.extend(StatusIcons::create_status_spans(pool.status.clone(), &usage_text));
-                lines.push(Line::from(usage_spans));
+            // Total usage line (always show for pools)
+            let usage_text = match (pool.usage_percent, pool.used_gb, pool.total_gb) {
+                (Some(pct), Some(used), Some(total)) => {
+                    format!("Total: {:.0}% {:.1}GB/{:.1}GB", pct, used, total)
+                }
+                _ => "Total: —% —GB/—GB".to_string(),
+            };
+            
+            let has_drives = !pool.drives.is_empty();
+            let tree_symbol = if has_drives { "├─" } else { "└─" };
+            let mut usage_spans = vec![
+                Span::raw("  "),
+                Span::styled(tree_symbol, Typography::tree()),
+                Span::raw(" "),
+            ];
+            usage_spans.extend(StatusIcons::create_status_spans(pool.status.clone(), &usage_text));
+            lines.push(Line::from(usage_spans));
+
+            // Drive lines with enhanced grouping
+            if pool.pool_type != "single" && pool.drives.len() > 1 {
+                // Group drives by type for mergerfs pools
+                let (data_drives, parity_drives): (Vec<_>, Vec<_>) = pool.drives.iter().enumerate()
+                    .partition(|(_, drive)| {
+                        // Simple heuristic: drives with 'parity' in name or sdc (common parity drive)
+                        !drive.name.to_lowercase().contains("parity") && drive.name != "sdc"
+                    });
+
+                // Show data drives
+                if !data_drives.is_empty() && pool.pool_type.contains("mergerfs") {
+                    lines.push(Line::from(vec![
+                        Span::raw("  "),
+                        Span::styled("├─ ", Typography::tree()),
+                        Span::styled("Data Disks:", Typography::secondary()),
+                    ]));
+                    
+                    for (i, (_, drive)) in data_drives.iter().enumerate() {
+                        let is_last = i == data_drives.len() - 1;
+                        if is_last && parity_drives.is_empty() {
+                            self.render_drive_line(&mut lines, drive, "│  └─");
+                        } else {
+                            self.render_drive_line(&mut lines, drive, "│  ├─");
+                        }
+                    }
+                }
+
+                // Show parity drives
+                if !parity_drives.is_empty() && pool.pool_type.contains("mergerfs") {
+                    lines.push(Line::from(vec![
+                        Span::raw("  "),
+                        Span::styled("└─ ", Typography::tree()),
+                        Span::styled("Parity:", Typography::secondary()),
+                    ]));
+                    
+                    for (i, (_, drive)) in parity_drives.iter().enumerate() {
+                        let is_last = i == parity_drives.len() - 1;
+                        if is_last {
+                            self.render_drive_line(&mut lines, drive, "   └─");
+                        } else {
+                            self.render_drive_line(&mut lines, drive, "   ├─");
+                        }
+                    }
+                } else {
+                    // Regular drive listing for non-mergerfs pools
+                    for (i, drive) in pool.drives.iter().enumerate() {
+                        let is_last = i == pool.drives.len() - 1;
+                        let tree_symbol = if is_last { "└─" } else { "├─" };
+                        self.render_drive_line(&mut lines, drive, tree_symbol);
+                    }
+                }
+            } else {
+                // Single drive or simple pools
+                for (i, drive) in pool.drives.iter().enumerate() {
+                    let is_last = i == pool.drives.len() - 1;
+                    let tree_symbol = if is_last { "└─" } else { "├─" };
+                    self.render_drive_line(&mut lines, drive, tree_symbol);
+                }
             }
         }
 
         lines
     }
+
+    /// Helper to render a single drive line
+    fn render_drive_line<'a>(&self, lines: &mut Vec<Line<'a>>, drive: &StorageDrive, tree_symbol: &'a str) {
+        let mut drive_info = Vec::new();
+        if let Some(temp) = drive.temperature {
+            drive_info.push(format!("T: {:.0}°C", temp));
+        }
+        if let Some(wear) = drive.wear_percent {
+            drive_info.push(format!("W: {:.0}%", wear));
+        }
+        let drive_text = if drive_info.is_empty() {
+            drive.name.clone()
+        } else {
+            format!("{} {}", drive.name, drive_info.join(" • "))
+        };
+
+        let mut drive_spans = vec![
+            Span::raw("  "),
+            Span::styled(tree_symbol, Typography::tree()),
+            Span::raw(" "),
+        ];
+        drive_spans.extend(StatusIcons::create_status_spans(drive.status.clone(), &drive_text));
+        lines.push(Line::from(drive_spans));
+    }
 }
 
 impl Widget for SystemWidget {
@@ -513,48 +602,9 @@ 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())
-                ]));
-            }
-        }
+        lines.extend(storage_lines);
 
         // Apply scroll offset
         let total_lines = lines.len();

shared/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-shared"
-version = "0.1.94"
+version = "0.1.99"
 edition = "2021"
 
 [dependencies]

shared/src/metrics.rs

@@ -82,13 +82,13 @@ impl MetricValue {
 /// Health status for metrics
 #[derive(Debug, Clone, Copy, Serialize, Deserialize, PartialEq, Eq, PartialOrd, Ord)]
 pub enum Status {
-    Inactive, // Lowest priority - treated as good
-    Ok,       // Second lowest - also good
-    Unknown,
-    Offline,
-    Pending,
-    Warning,
-    Critical,
+    Inactive, // Lowest priority
+    Unknown,  // 
+    Offline,  // 
+    Pending,  // 
+    Ok,       // 5th place - good status has higher priority than unknown states
+    Warning,  // 
+    Critical, // Highest priority
 }
 
 impl Status {