diff --git a/include/Utils.h b/include/Utils.h
index a7682831..86335f76 100644
--- a/include/Utils.h
+++ b/include/Utils.h
@@ -168,6 +168,7 @@ public:
 	static Glib::ustring get_filesystem_software( FILESYSTEM filesystem ) ;
 	static bool kernel_supports_fs( const Glib::ustring & fs ) ;
 	static bool kernel_version_at_least( int major_ver, int minor_ver, int patch_ver ) ;
+	static bool swraid_member_is_active( const Glib::ustring & path ) ;
 	static Glib::ustring format_size( Sector sectors, Byte_Value sector_size ) ;
 	static Glib::ustring format_time( std::time_t seconds ) ;
 	static double sector_to_unit( Sector sectors, Byte_Value sector_size, SIZE_UNIT size_unit ) ;
diff --git a/src/GParted_Core.cc b/src/GParted_Core.cc
index 1959efa2..dc19f5bf 100644
--- a/src/GParted_Core.cc
+++ b/src/GParted_Core.cc
@@ -1051,8 +1051,9 @@ void GParted_Core::set_device_partitions( Device & device, PedDevice* lp_device,
 				}
 				else
 #endif
-					partition_is_busy = ped_partition_is_busy( lp_partition ) ||
-					                    ( filesystem == GParted::FS_LVM2_PV && lvm2_pv_info .has_active_lvs( partition_path ) ) ;
+					partition_is_busy =    ped_partition_is_busy( lp_partition )
+					                    || ( filesystem == FS_LVM2_PV      && lvm2_pv_info .has_active_lvs( partition_path ) )
+					                    || ( filesystem == FS_LINUX_SWRAID && Utils::swraid_member_is_active( partition_path ) ) ;
 
 				partition_temp .Set( device .get_path(),
 						     partition_path,
diff --git a/src/Utils.cc b/src/Utils.cc
index 2b305155..2b3ad4a5 100644
--- a/src/Utils.cc
+++ b/src/Utils.cc
@@ -324,6 +324,39 @@ bool Utils::kernel_version_at_least( int major_ver, int minor_ver, int patch_ver
 	return result ;
 }
 
+//Report whether the device is an active member of a Linux Software RAID array
+bool Utils::swraid_member_is_active( const Glib::ustring & path )
+{
+	//Read /proc/mdstat and look for the device name on an active RAID array
+	//  line.   Example line: "md1 : active raid1 sda1[2] sdb1[3]"
+	//                                           ^^^^^^
+	//                                           needle
+	//  Strip "/dev/" prefix and search for device name with surrounding
+	//  " " and "[" to avoid substring matches.
+	if ( path .substr( 0, 5 ) != "/dev/" )
+		return false ;
+
+	bool member_active = false ;
+	Glib::ustring needle = " " + path .substr( 5 ) + "[" ;
+	std::string line ;
+	std::ifstream input( "/proc/mdstat" ) ;
+	if ( input )
+	{
+		while ( getline( input, line ) )
+		{
+			if (    line .find( " : active " ) != std::string::npos
+			     && line .find( needle ) != std::string::npos       )
+			{
+				member_active = true ;
+				break ;
+			}
+		}
+		input .close() ;
+	}
+
+	return member_active ;
+}
+
 Glib::ustring Utils::format_size( Sector sectors, Byte_Value sector_size )
 {
 	std::stringstream ss ;
diff --git a/src/Win_GParted.cc b/src/Win_GParted.cc
index f34fe4fa..87307767 100644
--- a/src/Win_GParted.cc
+++ b/src/Win_GParted.cc
@@ -967,10 +967,11 @@ void Win_GParted::set_valid_operations()
 			                                           : CTEXT_ACTIVATE_FILESYSTEM )
 			                                          ) ;
 
-	//Only permit mount/unmount, swapon/swapoff, ... if action is available
+	//Only permit mount/unmount, swapon/swapoff, activate/deactivate if action is available
 	if (    selected_partition .status == GParted::STAT_REAL
 	     && selected_partition .type != GParted::TYPE_EXTENDED
 	     && selected_partition .filesystem != GParted::FS_LVM2_PV
+	     && selected_partition .filesystem != FS_LINUX_SWRAID
 	     && (    selected_partition .busy
 	          || selected_partition .get_mountpoints() .size() /* Have mount point(s) */
 	          || selected_partition .filesystem == GParted::FS_LINUX_SWAP