Enumerate physical drives behind RAID via smartctl megaraid passthrough

frontend/src/App.jsx

@@ -595,8 +595,71 @@ const driveTypeBadge = (type, t) => {
   );
 };
 
+function HostDriveRow({ d, onSelect, t, indent }) {
+  const healthStatus = d.health_status || "healthy";
+  const c = t.health[healthStatus] || t.health.healthy;
+  return (
+    <button
+      onClick={() => onSelect({ slot: d.megaraid_id || "-", device: d.device, populated: true, drive: d })}
+      style={{
+        display: "flex", alignItems: "center", gap: 16,
+        padding: indent ? "10px 16px 10px 44px" : "12px 16px", borderRadius: 12,
+        background: c.bg, border: `1px solid ${c.border}`,
+        cursor: "pointer", width: "100%", textAlign: "left",
+        transition: "all 0.18s",
+      }}
+      onMouseEnter={(e) => { e.currentTarget.style.transform = "scale(1.01)"; e.currentTarget.style.boxShadow = "0 4px 12px rgba(0,0,0,0.15)"; }}
+      onMouseLeave={(e) => { e.currentTarget.style.transform = "scale(1)"; e.currentTarget.style.boxShadow = "none"; }}
+    >
+      <span style={{ width: 9, height: 9, borderRadius: "50%", background: c.dot, flexShrink: 0 }} />
+      <span style={{
+        fontSize: indent ? 13 : 14, fontWeight: 700, color: t.text,
+        fontFamily: "'JetBrains Mono', monospace", minWidth: 80,
+      }}>
+        {indent && d.megaraid_id != null ? `disk ${d.megaraid_id}` : d.device}
+      </span>
+      {driveTypeBadge(d.drive_type, t)}
+      <span style={{
+        fontSize: 13, color: t.text, flex: 1,
+        overflow: "hidden", textOverflow: "ellipsis", whiteSpace: "nowrap",
+      }}>
+        {d.model || "\u2014"}
+      </span>
+      <span style={{
+        fontSize: 12, color: t.textSecondary,
+        fontFamily: "'JetBrains Mono', monospace",
+      }}>
+        {formatCapacity(d.capacity_bytes)}
+      </span>
+      {d.temperature_c != null && (
+        <span style={{
+          fontSize: 12, fontWeight: 600,
+          color: d.temperature_c >= 40 ? t.health.warning.text : t.text,
+        }}>
+          {d.temperature_c}&deg;C
+        </span>
+      )}
+      {d.power_on_hours != null && indent && (
+        <span style={{ fontSize: 11, color: t.textSecondary }}>
+          {formatHours(d.power_on_hours)}
+        </span>
+      )}
+      {d.zfs_pool && (
+        <span style={{
+          fontSize: 11, fontWeight: 700, color: t.accent,
+          fontFamily: "'JetBrains Mono', monospace",
+        }}>
+          {d.zfs_pool}
+        </span>
+      )}
+      <StatusPill status={healthStatus} t={t} />
+    </button>
+  );
+}
+
 function HostDrivesCard({ drives, onSelect, t }) {
   if (!drives || drives.length === 0) return null;
+  const totalCount = drives.reduce((n, d) => n + 1 + (d.physical_drives?.length || 0), 0);
   return (
     <div style={{
       background: t.cardBg, borderRadius: 16,
@@ -612,69 +675,32 @@ function HostDrivesCard({ drives, onSelect, t }) {
         <div>
           <div style={{ fontSize: 16, fontWeight: 700, color: t.text }}>Host Drives</div>
           <div style={{ fontSize: 12, color: t.textSecondary, marginTop: 2 }}>
-            {drives.length} drive{drives.length !== 1 ? "s" : ""} &middot; non-enclosure
+            {totalCount} drive{totalCount !== 1 ? "s" : ""} &middot; non-enclosure
           </div>
         </div>
       </div>
       <div style={{ padding: 16 }}>
         <div style={{ display: "flex", flexDirection: "column", gap: 8 }}>
-          {drives.map((d) => {
-            const healthStatus = d.health_status || "healthy";
-            const c = t.health[healthStatus] || t.health.healthy;
-            return (
-              <button
-                key={d.device}
-                onClick={() => onSelect({ slot: "-", device: d.device, populated: true, drive: d })}
-                style={{
-                  display: "flex", alignItems: "center", gap: 16,
-                  padding: "12px 16px", borderRadius: 12,
-                  background: c.bg, border: `1px solid ${c.border}`,
-                  cursor: "pointer", width: "100%", textAlign: "left",
-                  transition: "all 0.18s",
-                }}
-                onMouseEnter={(e) => { e.currentTarget.style.transform = "scale(1.01)"; e.currentTarget.style.boxShadow = "0 4px 12px rgba(0,0,0,0.15)"; }}
-                onMouseLeave={(e) => { e.currentTarget.style.transform = "scale(1)"; e.currentTarget.style.boxShadow = "none"; }}
-              >
-                <span style={{ width: 9, height: 9, borderRadius: "50%", background: c.dot, flexShrink: 0 }} />
-                <span style={{
-                  fontSize: 14, fontWeight: 700, color: t.text,
-                  fontFamily: "'JetBrains Mono', monospace", minWidth: 80,
-                }}>
-                  {d.device}
-                </span>
-                {driveTypeBadge(d.drive_type, t)}
-                <span style={{
-                  fontSize: 13, color: t.text, flex: 1,
-                  overflow: "hidden", textOverflow: "ellipsis", whiteSpace: "nowrap",
-                }}>
-                  {d.model || "\u2014"}
-                </span>
-                <span style={{
-                  fontSize: 12, color: t.textSecondary,
-                  fontFamily: "'JetBrains Mono', monospace",
-                }}>
-                  {formatCapacity(d.capacity_bytes)}
-                </span>
-                {d.temperature_c != null && (
+          {drives.map((d) => (
+            <React.Fragment key={d.device}>
+              <div style={{ position: "relative" }}>
+                <HostDriveRow d={d} onSelect={onSelect} t={t} />
+                {d.physical_drives?.length > 0 && (
                   <span style={{
-                    fontSize: 12, fontWeight: 600,
-                    color: d.temperature_c >= 40 ? t.health.warning.text : t.text,
+                    position: "absolute", top: 8, right: 8,
+                    fontSize: 10, fontWeight: 700, color: t.textMuted,
+                    background: t.health.empty.bg, border: `1px solid ${t.cardBorder}`,
+                    padding: "2px 6px", borderRadius: 4,
                   }}>
-                    {d.temperature_c}&deg;C
+                    {d.physical_drives.length} disks
                   </span>
                 )}
-                {d.zfs_pool && (
-                  <span style={{
-                    fontSize: 11, fontWeight: 700, color: t.accent,
-                    fontFamily: "'JetBrains Mono', monospace",
-                  }}>
-                    {d.zfs_pool}
-                  </span>
-                )}
-                <StatusPill status={healthStatus} t={t} />
-              </button>
-            );
-          })}
+              </div>
+              {d.physical_drives?.map((pd, i) => (
+                <HostDriveRow key={pd.serial || i} d={pd} onSelect={onSelect} t={t} indent />
+              ))}
+            </React.Fragment>
+          ))}
         </div>
       </div>
     </div>

models/schemas.py

@@ -95,6 +95,8 @@ class HostDrive(BaseModel):
     zfs_vdev: str | None = None
     zfs_state: str | None = None
     health_status: str = "healthy"
+    megaraid_id: str | None = None
+    physical_drives: list["HostDrive"] = []
 
 
 class Overview(BaseModel):

routers/overview.py

@@ -132,6 +132,15 @@ async def get_overview():
             all_healthy = False
         elif hs == "warning":
             warnings += 1
+        # Count physical drives behind RAID controllers
+        for pd in hd.get("physical_drives", []):
+            total_drives += 1
+            pd_hs = pd.get("health_status", "healthy")
+            if pd_hs == "error":
+                errors += 1
+                all_healthy = False
+            elif pd_hs == "warning":
+                warnings += 1
         host_drives_out.append(HostDrive(**hd))
 
     return Overview(

services/host.py

@@ -3,7 +3,7 @@ import json
 import logging
 
 from services.enclosure import discover_enclosures, list_slots
-from services.smart import get_smart_data
+from services.smart import get_smart_data, scan_megaraid_drives
 from services.zfs import get_zfs_pool_map
 
 logger = logging.getLogger(__name__)
@@ -106,6 +106,31 @@ async def get_host_drives() -> list[dict]:
             "zfs_vdev": zfs_info.get("vdev"),
             "zfs_state": zfs_info.get("state"),
             "health_status": health_status,
+            "physical_drives": [],
         })
 
+    # Discover physical drives behind RAID controllers
+    has_raid = any(r["drive_type"] == "raid" and not r["smart_supported"] for r in results)
+    if has_raid:
+        megaraid_drives = await scan_megaraid_drives()
+        for pd in megaraid_drives:
+            pd_healthy = pd.get("smart_healthy")
+            pd_realloc = pd.get("reallocated_sectors") or 0
+            pd_pending = pd.get("pending_sectors") or 0
+            pd_unc = pd.get("uncorrectable_errors") or 0
+            if pd_healthy is False:
+                pd["health_status"] = "error"
+            elif pd_realloc > 0 or pd_pending > 0 or pd_unc > 0:
+                pd["health_status"] = "warning"
+            else:
+                pd["health_status"] = "healthy"
+            pd["drive_type"] = "physical"
+            pd["physical_drives"] = []
+
+        # Attach to the first RAID host drive
+        for r in results:
+            if r["drive_type"] == "raid" and not r["smart_supported"]:
+                r["physical_drives"] = megaraid_drives
+                break
+
     return results

services/smart.py

@@ -145,6 +145,60 @@ def _parse_smart_json(device: str, data: dict) -> dict:
     return result
 
 
+async def scan_megaraid_drives() -> list[dict]:
+    """Discover physical drives behind MegaRAID controllers via smartctl --scan."""
+    try:
+        proc = await asyncio.create_subprocess_exec(
+            "smartctl", "--scan", "-j",
+            stdout=asyncio.subprocess.PIPE,
+            stderr=asyncio.subprocess.PIPE,
+        )
+        stdout, _ = await proc.communicate()
+        scan_data = json.loads(stdout)
+    except (FileNotFoundError, json.JSONDecodeError) as e:
+        logger.warning("smartctl --scan failed: %s", e)
+        return []
+
+    devices = scan_data.get("devices", [])
+    megaraid_entries = [
+        d for d in devices
+        if "megaraid" in (d.get("type") or "")
+    ]
+
+    if not megaraid_entries:
+        return []
+
+    # Query SMART for each physical drive concurrently
+    async def _query(entry: dict) -> dict | None:
+        dev_path = entry["name"]
+        dev_type = entry["type"]
+        try:
+            proc = await asyncio.create_subprocess_exec(
+                "smartctl", "-a", "-j", "-d", dev_type, dev_path,
+                stdout=asyncio.subprocess.PIPE,
+                stderr=asyncio.subprocess.PIPE,
+            )
+            stdout, _ = await proc.communicate()
+            if not stdout:
+                return None
+            data = json.loads(stdout)
+        except (FileNotFoundError, json.JSONDecodeError):
+            return None
+
+        # Extract the disk number from type like "sat+megaraid,0"
+        megaraid_id = dev_type.split("megaraid,")[-1] if "megaraid," in dev_type else dev_type
+
+        result = _parse_smart_json(f"megaraid:{megaraid_id}", data)
+        result["megaraid_id"] = megaraid_id
+        result["megaraid_type"] = dev_type
+        result["megaraid_device"] = dev_path
+        return result
+
+    tasks = [_query(e) for e in megaraid_entries]
+    results = await asyncio.gather(*tasks, return_exceptions=True)
+    return [r for r in results if isinstance(r, dict)]
+
+
 def _get_attr_raw(attrs: list[dict], attr_id: int) -> int | None:
     """Get the raw_value for a SMART attribute by ID."""
     for attr in attrs: