diff --git a/src/internal/qmmonitor/block.go b/src/internal/qmmonitor/block.go
index 693f680..fa51f3a 100644
--- a/src/internal/qmmonitor/block.go
+++ b/src/internal/qmmonitor/block.go
@@ -17,8 +17,10 @@ type DiskInfo struct {
 	Labels   map[string]string // additional labels: vol_name, pool, device, etc.
 }
 
-// blockHeaderRe matches: "disk_name (#blockN): /path/to/disk (type, mode)"
-var blockHeaderRe = regexp.MustCompile(`^(\w+) \(#block(\d+)\): (.+) \(([\w, -]+)\)$`)
+// blockHeaderRe matches block device headers in both old and new QEMU formats:
+//   Old: "disk_name (#blockN): /path/to/disk (type, mode)"
+//   New: "disk_name: /path/to/disk (type, mode)"
+var blockHeaderRe = regexp.MustCompile(`^(\w+)(?:\s+\(#block(\d+)\))?: (.+) \(([\w, -]+)\)$`)
 
 // lvmRe matches: /dev/{vg_name}/vm-{N}-disk-{N}
 var lvmRe = regexp.MustCompile(`^/dev/([^/]+)/(vm-\d+-disk-\d+)$`)
@@ -98,7 +100,8 @@ func ParseBlockInfo(raw string) map[string]DiskInfo {
 				val := strings.TrimSpace(strings.TrimPrefix(line, "Cache mode:"))
 				info.Labels["cache_mode"] = val
 			} else if strings.HasPrefix(line, "Detect zeroes:") {
-				info.Labels["detect_zeroes"] = "on"
+				val := strings.TrimSpace(strings.TrimPrefix(line, "Detect zeroes:"))
+				info.Labels["detect_zeroes"] = val
 			}
 		}
 
diff --git a/src/internal/qmmonitor/block_test.go b/src/internal/qmmonitor/block_test.go
index 7cb350b..7cc259a 100644
--- a/src/internal/qmmonitor/block_test.go
+++ b/src/internal/qmmonitor/block_test.go
@@ -172,6 +172,52 @@ func TestParseBlockInfo_JSONError(t *testing.T) {
 	}
 }
 
+func TestParseBlockInfo_Throttle(t *testing.T) {
+	// PVE 9.x / newer QEMU format: no (#blockN)
+	raw := `drive-scsi0: json:{"driver":"raw","file":{"driver":"host_device","filename":"/dev/zvol/rpool/data/vm-100-disk-0"}} (throttle, read-write)
+    Attached to:      /machine/peripheral/virtioscsi0/virtio-backend
+    Cache mode:       writeback, direct
+    Detect zeroes:    unmap
+`
+	disks := ParseBlockInfo(raw)
+	if len(disks) != 1 {
+		t.Fatalf("expected 1 disk, got %d", len(disks))
+	}
+	d := disks["scsi0"]
+	if d.BlockID != "" {
+		t.Errorf("block_id = %q, want empty", d.BlockID)
+	}
+	if d.DiskType != "zvol" {
+		t.Errorf("type = %q, want zvol", d.DiskType)
+	}
+	if d.DiskPath != "/dev/zvol/rpool/data/vm-100-disk-0" {
+		t.Errorf("path = %q", d.DiskPath)
+	}
+	if d.Labels["pool"] != "rpool/data" {
+		t.Errorf("pool = %q", d.Labels["pool"])
+	}
+	if d.Labels["vol_name"] != "vm-100-disk-0" {
+		t.Errorf("vol_name = %q", d.Labels["vol_name"])
+	}
+	if d.Labels["detect_zeroes"] != "unmap" {
+		t.Errorf("detect_zeroes = %q, want unmap", d.Labels["detect_zeroes"])
+	}
+	if d.Labels["cache_mode"] != "writeback, direct" {
+		t.Errorf("cache_mode = %q", d.Labels["cache_mode"])
+	}
+}
+
+func TestParseBlockInfo_DetectZeroesUnmap(t *testing.T) {
+	raw := `drive-scsi0 (#block100): /dev/zvol/rpool/data/vm-100-disk-0 (raw, read-write)
+    Detect zeroes:    unmap
+`
+	disks := ParseBlockInfo(raw)
+	d := disks["scsi0"]
+	if d.Labels["detect_zeroes"] != "unmap" {
+		t.Errorf("detect_zeroes = %q, want unmap", d.Labels["detect_zeroes"])
+	}
+}
+
 func TestParseBlockInfo_MultiDisk(t *testing.T) {
 	raw := `drive-scsi0 (#block100): /dev/zvol/rpool/data/vm-100-disk-0 (raw, read-write)
     Attached to:      /machine/peripheral/virtioscsi0/virtio-backend