@@ -375,3 +381,3 @@
       return returnvalue::FAILED;
     }
-    result = checkActionReply(replyLen);
+    result = checkActionReply(replyLen, "sky image upload");

@@ -168,0 +176,4 @@
+void StarTrackerHandler::loadTargetFirmwareFromPersistentCfg() {
+  const char* prefix = sdCardIF.getCurrentMountPrefix();
+  std::filesystem::path path = std::filesystem::path(prefix) / startracker::FW_TARGET_CFG_PATH;
+  std::ifstream ifile(path);

@@ -168,0 +181,4 @@
+    std::string targetStr;
+    std::getline(ifile, targetStr);
+    if (targetStr == "backup") {
+      firmwareTargetRaw = static_cast<uint8_t>(startracker::FirmwareTarget::BACKUP);

@@ -2404,2 +2435,2 @@
-      sif::warning << "StarTrackerHandler::checkProgram: Version set has invalid program ID"
-                   << std::endl;
+      sif::warning << "StarTrackerHandler::checkProgram: Version set has invalid program ID "
+                   << (int)versionSet.program.value << std::endl;

@@ -2866,3 +2897,3 @@
     case startracker::REQ_CENTROIDS:
     case startracker::REQ_CONTRAST: {
-      if (getMode() == MODE_ON and getSubmode() != startracker::Program::FIRMWARE) {
+      if (getMode() == MODE_ON and getSubmode() != startracker::Program::FIRMWARE_MAIN) {

@@ -2886,0 +2941,4 @@
+        }
+      } else {
+        sif::warning << "SD card not usable" << std::endl;
+        return returnvalue::FAILED;

@@ -489,7 +496,8 @@ static constexpr uint8_t MATCHED_CENTROIDS = 40;
 
 namespace Program {
 static const uint8_t BOOTLOADER = 1;