Replace device names with serial numbers in MergerFS pool display

Updates disk collector and dashboard to show drive serial numbers
instead of device names (sdX) for MergerFS data/parity drives.
Agent extracts serial numbers from SMART data and dashboard
displays them when available, falling back to device names.

Cargo.lock

@@ -279,7 +279,7 @@ checksum = "a1d728cc89cf3aee9ff92b05e62b19ee65a02b5702cff7d5a377e32c6ae29d8d"
 
 [[package]]
 name = "cm-dashboard"
-version = "0.1.149"
+version = "0.1.154"
 dependencies = [
  "anyhow",
  "chrono",
@@ -301,7 +301,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-agent"
-version = "0.1.149"
+version = "0.1.154"
 dependencies = [
  "anyhow",
  "async-trait",
@@ -324,7 +324,7 @@ dependencies = [
 
 [[package]]
 name = "cm-dashboard-shared"
-version = "0.1.149"
+version = "0.1.154"
 dependencies = [
  "chrono",
  "serde",

agent/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-agent"
-version = "0.1.150"
+version = "0.1.154"
 edition = "2021"
 
 [dependencies]

agent/src/collectors/disk.rs

@@ -50,6 +50,7 @@ struct MergerfsPool {
 #[derive(Debug, Clone)]
 struct PoolDrive {
     name: String,                    // Drive name
+    mount_point: String,             // e.g., "/mnt/disk1"
     temperature_celsius: Option<f32>, // Drive temperature
 }
 
@@ -75,11 +76,17 @@ impl DiskCollector {
         let mount_devices = self.get_mount_devices().await?;
         
         // Step 2: Get filesystem usage for each mount point using df
-        let filesystem_usage = self.get_filesystem_usage(&mount_devices).map_err(|e| CollectorError::Parse {
+        let mut filesystem_usage = self.get_filesystem_usage(&mount_devices).map_err(|e| CollectorError::Parse {
             value: "filesystem usage".to_string(),
             error: format!("Failed to get filesystem usage: {}", e),
         })?;
         
+        // Step 2.5: Add MergerFS mount points that weren't in lsblk output
+        self.add_mergerfs_filesystem_usage(&mut filesystem_usage).map_err(|e| CollectorError::Parse {
+            value: "mergerfs filesystem usage".to_string(),
+            error: format!("Failed to get mergerfs filesystem usage: {}", e),
+        })?;
+        
         // Step 3: Detect MergerFS pools
         let mergerfs_pools = self.detect_mergerfs_pools(&filesystem_usage).map_err(|e| CollectorError::Parse {
             value: "mergerfs pools".to_string(),
@@ -155,6 +162,30 @@ impl DiskCollector {
         Ok(filesystem_usage)
     }
 
+    /// Add filesystem usage for MergerFS mount points that aren't in lsblk
+    fn add_mergerfs_filesystem_usage(&self, filesystem_usage: &mut HashMap<String, (u64, u64)>) -> anyhow::Result<()> {
+        let mounts_content = std::fs::read_to_string("/proc/mounts")
+            .map_err(|e| anyhow::anyhow!("Failed to read /proc/mounts: {}", e))?;
+        
+        for line in mounts_content.lines() {
+            let parts: Vec<&str> = line.split_whitespace().collect();
+            if parts.len() >= 3 && parts[2] == "fuse.mergerfs" {
+                let mount_point = parts[1].to_string();
+                
+                // Only add if we don't already have usage data for this mount point
+                if !filesystem_usage.contains_key(&mount_point) {
+                    if let Ok((total, used)) = self.get_filesystem_info(&mount_point) {
+                        debug!("Added MergerFS filesystem usage for {}: {}GB total, {}GB used", 
+                            mount_point, total as f32 / (1024.0 * 1024.0 * 1024.0), used as f32 / (1024.0 * 1024.0 * 1024.0));
+                        filesystem_usage.insert(mount_point, (total, used));
+                    }
+                }
+            }
+        }
+        
+        Ok(())
+    }
+
     /// Get filesystem info for a single mount point
     fn get_filesystem_info(&self, mount_point: &str) -> Result<(u64, u64), CollectorError> {
         let output = Command::new("df")
@@ -198,16 +229,80 @@ impl DiskCollector {
     }
 
     /// Detect MergerFS pools from mount data
-    fn detect_mergerfs_pools(&self, _filesystem_usage: &HashMap<String, (u64, u64)>) -> anyhow::Result<Vec<MergerfsPool>> {
+    fn detect_mergerfs_pools(&self, filesystem_usage: &HashMap<String, (u64, u64)>) -> anyhow::Result<Vec<MergerfsPool>> {
-        let pools = Vec::new();
+        let mounts_content = std::fs::read_to_string("/proc/mounts")
+            .map_err(|e| anyhow::anyhow!("Failed to read /proc/mounts: {}", e))?;
+        let mut pools = Vec::new();
         
-        // For now, return empty pools - full mergerfs detection would require parsing /proc/mounts for fuse.mergerfs
+        for line in mounts_content.lines() {
-        // This ensures we don't break existing functionality
+            let parts: Vec<&str> = line.split_whitespace().collect();
+            if parts.len() >= 3 && parts[2] == "fuse.mergerfs" {
+                let mount_point = parts[1].to_string();
+                let device_sources = parts[0]; // e.g., "/mnt/disk1:/mnt/disk2"
+                
+                // Get pool usage
+                let (total_bytes, used_bytes) = filesystem_usage.get(&mount_point)
+                    .copied()
+                    .unwrap_or((0, 0));
+                
+                // Extract pool name from mount point (e.g., "/srv/media" -> "srv_media")
+                let pool_name = if mount_point == "/" {
+                    "root".to_string()
+                } else {
+                    mount_point.trim_start_matches('/').replace('/', "_")
+                };
+                
+                if pool_name.is_empty() {
+                    debug!("Skipping mergerfs pool with empty name: {}", mount_point);
+                    continue;
+                }
+                
+                // Parse member paths - handle both full paths and numeric references
+                let raw_paths: Vec<String> = device_sources
+                    .split(':')
+                    .map(|s| s.trim().to_string())
+                    .filter(|s| !s.is_empty())
+                    .collect();
+                
+                // Convert numeric references to actual mount points if needed
+                let member_paths = if raw_paths.iter().any(|path| !path.starts_with('/')) {
+                    // Handle numeric format like "1:2" by finding corresponding /mnt/disk* paths
+                    self.resolve_numeric_mergerfs_paths(&raw_paths)?
+                } else {
+                    // Already full paths
+                    raw_paths
+                };
+                
+                // For SnapRAID setups, include parity drives that are related to this pool's data drives
+                let mut all_member_paths = member_paths.clone();
+                let related_parity_paths = self.discover_related_parity_drives(&member_paths)?;
+                all_member_paths.extend(related_parity_paths);
+                
+                // Categorize as data vs parity drives
+                let (data_drives, parity_drives) = match self.categorize_pool_drives(&all_member_paths) {
+                    Ok(drives) => drives,
+                    Err(e) => {
+                        debug!("Failed to categorize drives for pool {}: {}. Skipping.", mount_point, e);
+                        continue;
+                    }
+                };
+                
+                pools.push(MergerfsPool {
+                    name: pool_name,
+                    mount_point,
+                    total_bytes,
+                    used_bytes,
+                    data_drives,
+                    parity_drives,
+                });
+            }
+        }
         
+        debug!("Found {} mergerfs pools", pools.len());
         Ok(pools)
     }
 
-    /// Group filesystems by physical drive (excluding mergerfs members)
+    /// Group filesystems by physical drive (excluding mergerfs members) - exact old logic
     fn group_by_physical_drive(
         &self, 
         mount_devices: &HashMap<String, String>,
@@ -216,14 +311,14 @@ impl DiskCollector {
     ) -> anyhow::Result<Vec<PhysicalDrive>> {
         let mut drive_groups: HashMap<String, Vec<Filesystem>> = HashMap::new();
         
-        // Get all mergerfs member paths to exclude them
+        // Get all mergerfs member paths to exclude them - exactly like old code
         let mut mergerfs_members = std::collections::HashSet::new();
         for pool in mergerfs_pools {
             for drive in &pool.data_drives {
-                mergerfs_members.insert(drive.name.clone());
+                mergerfs_members.insert(drive.mount_point.clone());
             }
             for drive in &pool.parity_drives {
-                mergerfs_members.insert(drive.name.clone());
+                mergerfs_members.insert(drive.mount_point.clone());
             }
         }
         
@@ -342,12 +437,14 @@ impl DiskCollector {
             // Return unknown data rather than failing completely
             return Ok(SmartData {
                 health: "UNKNOWN".to_string(),
+                serial_number: None,
                 temperature_celsius: None,
                 wear_percent: None,
             });
         }
         
         let mut health = "UNKNOWN".to_string();
+        let mut serial_number = None;
         let mut temperature = None;
         let mut wear_percent = None;
 
@@ -360,6 +457,15 @@ impl DiskCollector {
                 }
             }
             
+            // Serial number parsing
+            if line.starts_with("Serial Number:") {
+                if let Some(serial_part) = line.split("Serial Number:").nth(1) {
+                    if let Some(serial_str) = serial_part.split_whitespace().next() {
+                        serial_number = Some(serial_str.to_string());
+                    }
+                }
+            }
+            
             // Temperature parsing for different drive types
             if line.contains("Temperature_Celsius") || line.contains("Airflow_Temperature_Cel") {
                 // Traditional SATA drives: attribute table format
@@ -402,6 +508,7 @@ impl DiskCollector {
 
         Ok(SmartData {
             health,
+            serial_number,
             temperature_celsius: temperature,
             wear_percent,
         })
@@ -444,28 +551,25 @@ impl DiskCollector {
     }
 
     /// Populate pools data into AgentData
-    fn populate_pools_data(&self, mergerfs_pools: &[MergerfsPool], _smart_data: &HashMap<String, SmartData>, agent_data: &mut AgentData) -> Result<(), CollectorError> {
+    fn populate_pools_data(&self, mergerfs_pools: &[MergerfsPool], smart_data: &HashMap<String, SmartData>, agent_data: &mut AgentData) -> Result<(), CollectorError> {
         for pool in mergerfs_pools {
+            // Calculate pool health and statuses based on member drive health
+            let (pool_health, health_status, usage_status, data_drive_data, parity_drive_data) = self.calculate_pool_health(pool, smart_data);
+            
             let pool_data = PoolData {
                 name: pool.name.clone(),
                 mount: pool.mount_point.clone(),
-                pool_type: "mergerfs".to_string(),
+                pool_type: format!("mergerfs ({}+{})", pool.data_drives.len(), pool.parity_drives.len()),
-                health: "healthy".to_string(), // TODO: Calculate based on member drives
+                health: pool_health,
-                usage_percent: (pool.used_bytes as f32 / pool.total_bytes as f32) * 100.0,
+                usage_percent: if pool.total_bytes > 0 {
+                    (pool.used_bytes as f32 / pool.total_bytes as f32) * 100.0
+                } else { 0.0 },
                 used_gb: pool.used_bytes as f32 / (1024.0 * 1024.0 * 1024.0),
                 total_gb: pool.total_bytes as f32 / (1024.0 * 1024.0 * 1024.0),
-                data_drives: pool.data_drives.iter().map(|d| cm_dashboard_shared::PoolDriveData {
+                data_drives: data_drive_data,
-                    name: d.name.clone(),
+                parity_drives: parity_drive_data,
-                    temperature_celsius: d.temperature_celsius,
+                health_status,
-                    health: "unknown".to_string(),
+                usage_status,
-                    wear_percent: None,
-                }).collect(),
-                parity_drives: pool.parity_drives.iter().map(|d| cm_dashboard_shared::PoolDriveData {
-                    name: d.name.clone(),
-                    temperature_celsius: d.temperature_celsius,
-                    health: "unknown".to_string(),
-                    wear_percent: None,
-                }).collect(),
             };
 
             agent_data.system.storage.pools.push(pool_data);
@@ -474,6 +578,84 @@ impl DiskCollector {
         Ok(())
     }
 
+    /// Calculate pool health based on member drive status
+    fn calculate_pool_health(&self, pool: &MergerfsPool, smart_data: &HashMap<String, SmartData>) -> (String, cm_dashboard_shared::Status, cm_dashboard_shared::Status, Vec<cm_dashboard_shared::PoolDriveData>, Vec<cm_dashboard_shared::PoolDriveData>) {
+        let mut failed_data = 0;
+        let mut failed_parity = 0;
+        
+        // Process data drives
+        let data_drive_data: Vec<cm_dashboard_shared::PoolDriveData> = pool.data_drives.iter().map(|d| {
+            let smart = smart_data.get(&d.name);
+            let health = smart.map(|s| s.health.clone()).unwrap_or_else(|| "UNKNOWN".to_string());
+            let temperature = smart.and_then(|s| s.temperature_celsius).or(d.temperature_celsius);
+            
+            if health == "FAILED" {
+                failed_data += 1;
+            }
+            
+            // Calculate drive statuses using config thresholds
+            let health_status = self.calculate_health_status(&health);
+            let temperature_status = temperature.map(|t| self.temperature_thresholds.evaluate(t)).unwrap_or(cm_dashboard_shared::Status::Unknown);
+            
+            cm_dashboard_shared::PoolDriveData {
+                name: d.name.clone(),
+                serial_number: smart.and_then(|s| s.serial_number.clone()),
+                temperature_celsius: temperature,
+                health,
+                wear_percent: smart.and_then(|s| s.wear_percent),
+                health_status,
+                temperature_status,
+            }
+        }).collect();
+        
+        // Process parity drives
+        let parity_drive_data: Vec<cm_dashboard_shared::PoolDriveData> = pool.parity_drives.iter().map(|d| {
+            let smart = smart_data.get(&d.name);
+            let health = smart.map(|s| s.health.clone()).unwrap_or_else(|| "UNKNOWN".to_string());
+            let temperature = smart.and_then(|s| s.temperature_celsius).or(d.temperature_celsius);
+            
+            if health == "FAILED" {
+                failed_parity += 1;
+            }
+            
+            // Calculate drive statuses using config thresholds
+            let health_status = self.calculate_health_status(&health);
+            let temperature_status = temperature.map(|t| self.temperature_thresholds.evaluate(t)).unwrap_or(cm_dashboard_shared::Status::Unknown);
+            
+            cm_dashboard_shared::PoolDriveData {
+                name: d.name.clone(),
+                serial_number: smart.and_then(|s| s.serial_number.clone()),
+                temperature_celsius: temperature,
+                health,
+                wear_percent: smart.and_then(|s| s.wear_percent),
+                health_status,
+                temperature_status,
+            }
+        }).collect();
+        
+        // Calculate overall pool health string and status
+        let (pool_health, health_status) = match (failed_data, failed_parity) {
+            (0, 0) => ("healthy".to_string(), cm_dashboard_shared::Status::Ok),
+            (1, 0) | (0, 1) => ("degraded".to_string(), cm_dashboard_shared::Status::Warning),
+            _ => ("critical".to_string(), cm_dashboard_shared::Status::Critical),
+        };
+        
+        // Calculate pool usage status using config thresholds
+        let usage_percent = if pool.total_bytes > 0 {
+            (pool.used_bytes as f32 / pool.total_bytes as f32) * 100.0
+        } else { 0.0 };
+        
+        let usage_status = if usage_percent >= self.config.usage_critical_percent {
+            cm_dashboard_shared::Status::Critical
+        } else if usage_percent >= self.config.usage_warning_percent {
+            cm_dashboard_shared::Status::Warning
+        } else {
+            cm_dashboard_shared::Status::Ok
+        };
+        
+        (pool_health, health_status, usage_status, data_drive_data, parity_drive_data)
+    }
+
     /// Calculate filesystem usage status
     fn calculate_filesystem_usage_status(&self, usage_percent: f32) -> Status {
         // Use standard filesystem warning/critical thresholds
@@ -499,6 +681,134 @@ impl DiskCollector {
             _ => Status::Unknown,
         }
     }
+
+    /// Discover parity drives that are related to the given data drives
+    fn discover_related_parity_drives(&self, data_drives: &[String]) -> anyhow::Result<Vec<String>> {
+        let mount_devices = tokio::task::block_in_place(|| {
+            tokio::runtime::Handle::current().block_on(self.get_mount_devices())
+        }).map_err(|e| anyhow::anyhow!("Failed to get mount devices: {}", e))?;
+        
+        let mut related_parity = Vec::new();
+        
+        // Find parity drives that share the same parent directory as the data drives
+        for data_path in data_drives {
+            if let Some(parent_dir) = self.get_parent_directory(data_path) {
+                // Look for parity drives in the same parent directory
+                for (mount_point, _device) in &mount_devices {
+                    if mount_point.contains("parity") && mount_point.starts_with(&parent_dir) {
+                        if !related_parity.contains(mount_point) {
+                            related_parity.push(mount_point.clone());
+                        }
+                    }
+                }
+            }
+        }
+        
+        Ok(related_parity)
+    }
+    
+    /// Get parent directory of a mount path (e.g., "/mnt/disk1" -> "/mnt")
+    fn get_parent_directory(&self, path: &str) -> Option<String> {
+        if let Some(last_slash) = path.rfind('/') {
+            if last_slash > 0 {
+                return Some(path[..last_slash].to_string());
+            }
+        }
+        None
+    }
+
+    /// Categorize pool member drives as data vs parity
+    fn categorize_pool_drives(&self, member_paths: &[String]) -> anyhow::Result<(Vec<PoolDrive>, Vec<PoolDrive>)> {
+        let mut data_drives = Vec::new();
+        let mut parity_drives = Vec::new();
+        
+        for path in member_paths {
+            let drive_info = self.get_drive_info_for_path(path)?;
+            
+            // Heuristic: if path contains "parity", it's parity
+            if path.to_lowercase().contains("parity") {
+                parity_drives.push(drive_info);
+            } else {
+                data_drives.push(drive_info);
+            }
+        }
+        
+        Ok((data_drives, parity_drives))
+    }
+
+    /// Get drive information for a mount path
+    fn get_drive_info_for_path(&self, path: &str) -> anyhow::Result<PoolDrive> {
+        // Use lsblk to find the backing device
+        let output = Command::new("lsblk")
+            .args(&["-rn", "-o", "NAME,MOUNTPOINT"])
+            .output()
+            .map_err(|e| anyhow::anyhow!("Failed to run lsblk: {}", e))?;
+            
+        let output_str = String::from_utf8_lossy(&output.stdout);
+        let mut device = String::new();
+        
+        for line in output_str.lines() {
+            let parts: Vec<&str> = line.split_whitespace().collect();
+            if parts.len() >= 2 && parts[1] == path {
+                device = parts[0].to_string();
+                break;
+            }
+        }
+        
+        if device.is_empty() {
+            return Err(anyhow::anyhow!("Could not find device for path {}", path));
+        }
+        
+        // Extract base device name (e.g., "sda1" -> "sda")
+        let base_device = self.extract_base_device(&format!("/dev/{}", device));
+        
+        // Get temperature from SMART data if available
+        let temperature = if let Ok(smart_data) = tokio::task::block_in_place(|| {
+            tokio::runtime::Handle::current().block_on(self.get_smart_data(&base_device))
+        }) {
+            smart_data.temperature_celsius
+        } else {
+            None
+        };
+        
+        Ok(PoolDrive {
+            name: base_device,
+            mount_point: path.to_string(),
+            temperature_celsius: temperature,
+        })
+    }
+
+    /// Resolve numeric mergerfs references like "1:2" to actual mount paths
+    fn resolve_numeric_mergerfs_paths(&self, numeric_refs: &[String]) -> anyhow::Result<Vec<String>> {
+        let mut resolved_paths = Vec::new();
+        
+        // Get all mount points that look like /mnt/disk* or /mnt/parity*
+        let mount_devices = tokio::task::block_in_place(|| {
+            tokio::runtime::Handle::current().block_on(self.get_mount_devices())
+        }).map_err(|e| anyhow::anyhow!("Failed to get mount devices: {}", e))?;
+        
+        let mut disk_mounts: Vec<String> = mount_devices.keys()
+            .filter(|path| path.starts_with("/mnt/disk") || path.starts_with("/mnt/parity"))
+            .cloned()
+            .collect();
+        disk_mounts.sort(); // Ensure consistent ordering
+        
+        for num_ref in numeric_refs {
+            if let Ok(index) = num_ref.parse::<usize>() {
+                // Convert 1-based index to 0-based
+                if index > 0 && index <= disk_mounts.len() {
+                    resolved_paths.push(disk_mounts[index - 1].clone());
+                }
+            }
+        }
+        
+        // Fallback: if we couldn't resolve, return the original paths
+        if resolved_paths.is_empty() {
+            resolved_paths = numeric_refs.to_vec();
+        }
+        
+        Ok(resolved_paths)
+    }
 }
 
 #[async_trait]
@@ -512,6 +822,7 @@ impl Collector for DiskCollector {
 #[derive(Debug, Clone)]
 struct SmartData {
     health: String,
+    serial_number: Option<String>,
     temperature_celsius: Option<f32>,
     wear_percent: Option<f32>,
 }

dashboard/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard"
-version = "0.1.150"
+version = "0.1.154"
 edition = "2021"
 
 [dependencies]

dashboard/src/ui/widgets/system.rs

@@ -57,7 +57,9 @@ struct StoragePool {
     name: String,
     mount_point: String,
     pool_type: String, // "single", "mergerfs (2+1)", "RAID5 (3+1)", etc.
-    drives: Vec<StorageDrive>,
+    drives: Vec<StorageDrive>, // For physical drives
+    data_drives: Vec<StorageDrive>, // For MergerFS pools
+    parity_drives: Vec<StorageDrive>, // For MergerFS pools
     filesystems: Vec<FileSystem>, // For physical drive pools: individual filesystem children
     usage_percent: Option<f32>,
     used_gb: Option<f32>,
@@ -227,6 +229,8 @@ impl SystemWidget {
                 mount_point: drive.name.clone(),
                 pool_type: "drive".to_string(),
                 drives: Vec::new(),
+                data_drives: Vec::new(),
+                parity_drives: Vec::new(),
                 filesystems: Vec::new(),
                 usage_percent: None,
                 used_gb: None,
@@ -267,7 +271,81 @@ impl SystemWidget {
             pools.insert(drive.name.clone(), pool);
         }
 
-        // Convert pools
+        // Convert pools (MergerFS, RAID, etc.)
+        for pool in &agent_data.system.storage.pools {
+            // Use agent-calculated status (combined health and usage status)
+            let pool_status = if pool.health_status == Status::Critical || pool.usage_status == Status::Critical {
+                Status::Critical
+            } else if pool.health_status == Status::Warning || pool.usage_status == Status::Warning {
+                Status::Warning
+            } else if pool.health_status == Status::Ok && pool.usage_status == Status::Ok {
+                Status::Ok
+            } else {
+                Status::Unknown
+            };
+            
+            let mut storage_pool = StoragePool {
+                name: pool.name.clone(),
+                mount_point: pool.mount.clone(),
+                pool_type: pool.pool_type.clone(),
+                drives: Vec::new(),
+                data_drives: Vec::new(),
+                parity_drives: Vec::new(),
+                filesystems: Vec::new(),
+                usage_percent: Some(pool.usage_percent),
+                used_gb: Some(pool.used_gb),
+                total_gb: Some(pool.total_gb),
+                status: pool_status,
+            };
+
+            // Add data drives - use agent-calculated status
+            for drive in &pool.data_drives {
+                // Use combined health and temperature status
+                let drive_status = if drive.health_status == Status::Critical || drive.temperature_status == Status::Critical {
+                    Status::Critical
+                } else if drive.health_status == Status::Warning || drive.temperature_status == Status::Warning {
+                    Status::Warning
+                } else if drive.health_status == Status::Ok && drive.temperature_status == Status::Ok {
+                    Status::Ok
+                } else {
+                    Status::Unknown
+                };
+                
+                let display_name = drive.serial_number.clone().unwrap_or(drive.name.clone());
+                let storage_drive = StorageDrive {
+                    name: display_name,
+                    temperature: drive.temperature_celsius,
+                    wear_percent: drive.wear_percent,
+                    status: drive_status,
+                };
+                storage_pool.data_drives.push(storage_drive);
+            }
+
+            // Add parity drives - use agent-calculated status
+            for drive in &pool.parity_drives {
+                // Use combined health and temperature status
+                let drive_status = if drive.health_status == Status::Critical || drive.temperature_status == Status::Critical {
+                    Status::Critical
+                } else if drive.health_status == Status::Warning || drive.temperature_status == Status::Warning {
+                    Status::Warning
+                } else if drive.health_status == Status::Ok && drive.temperature_status == Status::Ok {
+                    Status::Ok
+                } else {
+                    Status::Unknown
+                };
+                
+                let display_name = drive.serial_number.clone().unwrap_or(drive.name.clone());
+                let storage_drive = StorageDrive {
+                    name: display_name,
+                    temperature: drive.temperature_celsius,
+                    wear_percent: drive.wear_percent,
+                    status: drive_status,
+                };
+                storage_pool.parity_drives.push(storage_drive);
+            }
+
+            pools.insert(pool.name.clone(), storage_pool);
+        }
 
         // Store pools
         let mut pool_list: Vec<StoragePool> = pools.into_values().collect();
@@ -306,8 +384,8 @@ impl SystemWidget {
                     pool.name.clone()
                 }
             } else {
-                // For mergerfs pools, show pool name with format
+                // For mergerfs pools, show pool name with format like "mergerfs (2+1):"
-                format!("{} ({})", pool.mount_point, pool.pool_type)
+                format!("{}:", pool.pool_type)
             };
 
             let pool_spans = StatusIcons::create_status_spans(pool.status.clone(), &pool_label);
@@ -336,30 +414,71 @@ impl SystemWidget {
                     lines.push(Line::from(fs_spans));
                 }
             } else {
-                // For mergerfs pools, show data drives and parity drives in tree structure
+                // For mergerfs pools, show structure matching CLAUDE.md format:
-                if !pool.drives.is_empty() {
+                // ● mergerfs (2+1):
-                    // Group drives by type based on naming conventions or show all as data drives
+                //   ├─ Total: ● 63% 2355.2GB/3686.4GB
-                    let (data_drives, parity_drives): (Vec<_>, Vec<_>) = pool.drives.iter()
+                //   ├─ Data Disks:
-                        .partition(|d| !d.name.contains("parity") && !d.name.starts_with("sdc"));
+                //   │  ├─ ● sdb T: 24°C W: 5%
+                //   │  └─ ● sdd T: 27°C W: 5%
+                //   ├─ Parity: ● sdc T: 24°C W: 5%
+                //   └─ Mount: /srv/media
+                
+                // Pool total usage
+                let total_text = format!("Total: {:.0}% {:.1}GB/{:.1}GB",
+                    pool.usage_percent.unwrap_or(0.0),
+                    pool.used_gb.unwrap_or(0.0),
+                    pool.total_gb.unwrap_or(0.0)
+                );
+                let mut total_spans = vec![
+                    Span::styled("  ├─ ", Typography::tree()),
+                ];
+                total_spans.extend(StatusIcons::create_status_spans(Status::Ok, &total_text));
+                lines.push(Line::from(total_spans));
 
-                    if !data_drives.is_empty() {
+                // Data Disks section
-                        lines.push(Line::from(vec![
+                if !pool.data_drives.is_empty() {
-                            Span::styled("  ├─ Data Disks:", Typography::secondary())
+                    lines.push(Line::from(vec![
-                        ]));
+                        Span::styled("  ├─ ", Typography::tree()),
-                        for (i, drive) in data_drives.iter().enumerate() {
+                        Span::styled("Data Disks:", Typography::secondary())
-                            render_pool_drive(drive, i == data_drives.len() - 1 && parity_drives.is_empty(), &mut lines);
+                    ]));
-                        }
+                    for (i, drive) in pool.data_drives.iter().enumerate() {
-                    }
+                        let is_last = i == pool.data_drives.len() - 1;
-
+                        let tree_symbol = if is_last { "  │  └─ " } else { "  │  ├─ " };
-                    if !parity_drives.is_empty() {
+                        render_mergerfs_drive(drive, tree_symbol, &mut lines);
-                        lines.push(Line::from(vec![
-                            Span::styled("  └─ Parity:", Typography::secondary())
-                        ]));
-                        for (i, drive) in parity_drives.iter().enumerate() {
-                            render_pool_drive(drive, i == parity_drives.len() - 1, &mut lines);
-                        }
                     }
                 }
+
+                // Parity section
+                if !pool.parity_drives.is_empty() {
+                    for drive in &pool.parity_drives {
+                        let mut drive_details = Vec::new();
+                        if let Some(temp) = drive.temperature {
+                            drive_details.push(format!("T: {}°C", temp as i32));
+                        }
+                        if let Some(wear) = drive.wear_percent {
+                            drive_details.push(format!("W: {}%", wear as i32));
+                        }
+                        
+                        let drive_text = if !drive_details.is_empty() {
+                            format!("{} {}", drive.name, drive_details.join(" "))
+                        } else {
+                            drive.name.clone()
+                        };
+                        
+                        let mut parity_spans = vec![
+                            Span::styled("  ├─ ", Typography::tree()),
+                            Span::styled("Parity: ", Typography::secondary()),
+                        ];
+                        parity_spans.extend(StatusIcons::create_status_spans(drive.status.clone(), &drive_text));
+                        lines.push(Line::from(parity_spans));
+                    }
+                }
+
+                // Mount point
+                lines.push(Line::from(vec![
+                    Span::styled("  └─ Mount: ", Typography::tree()),
+                    Span::styled(&pool.mount_point, Typography::secondary())
+                ]));
             }
         }
 
@@ -367,6 +486,29 @@ impl SystemWidget {
     }
 }
 
+/// Helper function to render a drive in a MergerFS pool
+fn render_mergerfs_drive<'a>(drive: &StorageDrive, tree_symbol: &'a str, lines: &mut Vec<Line<'a>>) {
+    let mut drive_details = Vec::new();
+    if let Some(temp) = drive.temperature {
+        drive_details.push(format!("T: {}°C", temp as i32));
+    }
+    if let Some(wear) = drive.wear_percent {
+        drive_details.push(format!("W: {}%", wear as i32));
+    }
+    
+    let drive_text = if !drive_details.is_empty() {
+        format!("{} {}", drive.name, drive_details.join(" "))
+    } else {
+        drive.name.clone()
+    };
+    
+    let mut drive_spans = vec![
+        Span::styled(tree_symbol, Typography::tree()),
+    ];
+    drive_spans.extend(StatusIcons::create_status_spans(drive.status.clone(), &drive_text));
+    lines.push(Line::from(drive_spans));
+}
+
 /// Helper function to render a drive in a storage pool
 fn render_pool_drive(drive: &StorageDrive, is_last: bool, lines: &mut Vec<Line<'_>>) {
     let tree_symbol = if is_last { "    └─" } else { "    ├─" };

shared/Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "cm-dashboard-shared"
-version = "0.1.150"
+version = "0.1.154"
 edition = "2021"
 
 [dependencies]

shared/src/agent_data.rs

@@ -96,15 +96,20 @@ pub struct PoolData {
     pub total_gb: f32,
     pub data_drives: Vec<PoolDriveData>,
     pub parity_drives: Vec<PoolDriveData>,
+    pub health_status: Status,
+    pub usage_status: Status,
 }
 
 /// Drive in a storage pool
 #[derive(Debug, Clone, Serialize, Deserialize)]
 pub struct PoolDriveData {
     pub name: String,
+    pub serial_number: Option<String>,
     pub temperature_celsius: Option<f32>,
     pub wear_percent: Option<f32>,
     pub health: String,
+    pub health_status: Status,
+    pub temperature_status: Status,
 }
 
 /// Service monitoring data