Resolve "cta-taped should set the state to DOWN when machine rebooting"

ReleaseNotes.md

@@ -10,6 +10,7 @@
 
 ## Bug fixes
 - cta/CTA#1092 - Fix overflow error with drive state latestBandwith causing cta frontend crash
+- cta/CTA#501 - Fix disappearing reason when TapeDrive is reading or writing
 
 # v4.4.0-1
 

scheduler/TapeDrivesCatalogueState.cpp

@@ -276,7 +276,9 @@ void TapeDrivesCatalogueState::setDriveUpOrMaybeDown(common::dataStructures::Tap
   auto targetStatus = common::dataStructures::DriveStatus::Up;
   if (!driveState.desiredUp) {
     driveState.driveStatus = common::dataStructures::DriveStatus::Down;
-    driveState.reasonUpDown = inputs.reason;
+    if (!driveState.reasonUpDown) {
+      driveState.reasonUpDown = inputs.reason;
+    }
   }
   // If we were already up (or down), then we only update the last update time.
   if (driveState.driveStatus == targetStatus) {