Fix mountable flag for disk partitions

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit ff469a69ff)

tdecore/tdehw/tdehardwaredevices.cpp

@@ -2704,7 +2704,11 @@ void TDEHardwareDevices::updateExistingDeviceInformation(TDEGenericDevice* exist
 				diskstatus = diskstatus & ~TDEDiskDeviceStatus::Mountable;
 			}
 			// Partition tables cannot be mounted
-			if (TQString(udev_device_get_property_value(dev, "ID_PART_TABLE_TYPE")) != "") {
+			if ((TQString(udev_device_get_property_value(dev, "ID_PART_TABLE_TYPE")) != "")
+			    && ((TQString(udev_device_get_property_value(dev, "ID_PART_ENTRY_TYPE")).isEmpty())
+				|| (TQString(udev_device_get_property_value(dev, "ID_PART_ENTRY_TYPE")) == "0x5")
+				|| (TQString(udev_device_get_property_value(dev, "ID_PART_ENTRY_TYPE")) == "0xf")
+				|| (TQString(udev_device_get_property_value(dev, "ID_FS_USAGE")).upper() == "RAID"))) {
 				diskstatus = diskstatus & ~TDEDiskDeviceStatus::Mountable;
 			}
 			// If certain disk types do not report the presence of a filesystem, they are likely not mountable