Index: NVDataMgmt.c
===================================================================
diff -u -r40a953067e13f6479b0ea85dd760d903ea66612e -r3a57b1955aa7516898e4c2c855978bbf01c8ec62
--- NVDataMgmt.c	(.../NVDataMgmt.c)	(revision 40a953067e13f6479b0ea85dd760d903ea66612e)
+++ NVDataMgmt.c	(.../NVDataMgmt.c)	(revision 3a57b1955aa7516898e4c2c855978bbf01c8ec62)
@@ -1369,11 +1369,16 @@
         hdUsageInfoGroup.hdUsageInfo.txTimeTotalHrs         += hdUsageInfoGroup.hdUsageInfo.txTimeSinceLastSrvcHrs;
         hdUsageInfoGroup.hdUsageInfo.crc                     = crc16( (U08*)&hdUsageInfoGroup.hdUsageInfo, sizeof( HD_USAGE_INFO_RECORD_T ) - sizeof( U16 ) );
         hdUsageInfoGroup.crc                                 = crc16( (U08*)&hdUsageInfoGroup, sizeof( HD_USAGE_INFO_GROUP_T ) - sizeof( U16 ) );
+        usageWriteTries                                      = 0;
+        status                                               = TRUE;
 
         enqueue( NVDATAMGMT_WRITE, NVDATAMGMT_RTC, HD_USAGE_INFO_START_ADDRESS, (U08*)&hdUsageInfoGroup, 0, sizeof( HD_USAGE_INFO_GROUP_T ) );
         SEND_EVENT_WITH_2_U32_DATA( RECORDS_SPECS[ NVDATAMGMT_USAGE_INFO_RECORD ].nvEvent, 0, 0 )
-        status = TRUE;
     }
+    else if ( ++usageWriteTries > MAX_NUM_OF_WRITE_TRIES )
+    {
+        SET_ALARM_WITH_2_U32_DATA( ALARM_ID_HD_SOFTWARE_FAULT, SW_FAULT_ID_WRITE_USAGE_INFO_TO_NV_FAILURE, USAGE_INFO_TX_HOURS_SINCE_LAST_SRVC );
+    }
 
     return status;
 }
@@ -1394,11 +1399,16 @@
         hdUsageInfoGroup.hdUsageInfo.txLastStartTimeEpoch = epoch;
         hdUsageInfoGroup.hdUsageInfo.crc                  = crc16 ( (U08*)&hdUsageInfoGroup.hdUsageInfo, sizeof( HD_USAGE_INFO_RECORD_T ) - sizeof( U16 ) );
         hdUsageInfoGroup.crc                              = crc16 ( (U08*)&hdUsageInfoGroup, sizeof( HD_USAGE_INFO_GROUP_T ) - sizeof( U16 ) );
+        usageWriteTries                                   = 0;
+        status                                            = TRUE;
 
         enqueue( NVDATAMGMT_WRITE, NVDATAMGMT_RTC, HD_USAGE_INFO_START_ADDRESS, (U08*)&hdUsageInfoGroup, 0, sizeof( HD_USAGE_INFO_GROUP_T ) );
         SEND_EVENT_WITH_2_U32_DATA( RECORDS_SPECS[ NVDATAMGMT_USAGE_INFO_RECORD ].nvEvent, 0, 0 )
-        status = TRUE;
     }
+    else if ( ++usageWriteTries > MAX_NUM_OF_WRITE_TRIES )
+    {
+        SET_ALARM_WITH_2_U32_DATA( ALARM_ID_HD_SOFTWARE_FAULT, SW_FAULT_ID_WRITE_USAGE_INFO_TO_NV_FAILURE, USAGE_INFO_START_TX_TIME );
+    }
 
     return status;
 }
Index: NVDataMgmtHDRecords.h
===================================================================
diff -u -r087ae6de4dd6ffb50cf272e9d0aefaed062305ff -r3a57b1955aa7516898e4c2c855978bbf01c8ec62
--- NVDataMgmtHDRecords.h	(.../NVDataMgmtHDRecords.h)	(revision 087ae6de4dd6ffb50cf272e9d0aefaed062305ff)
+++ NVDataMgmtHDRecords.h	(.../NVDataMgmtHDRecords.h)	(revision 3a57b1955aa7516898e4c2c855978bbf01c8ec62)
@@ -147,6 +147,14 @@
     NUM_OF_CAL_DATA_HD_TEMP_SENSORS,                                                                            ///< Number of HD temperature sensors.
 } CAL_DATA_HD_TEMEPERATURE_SENSORS_T;
 
+/// HD usage info items
+typedef enum hd_usage_items
+{
+    USAGE_INFO_TX_HOURS_SINCE_LAST_SRVC = 0,                                                                    ///< Usage info Tx hours since last service.
+    USAGE_INFO_START_TX_TIME,                                                                                   ///< Usage info Tx start time.
+    NUM_OF_USAGE_INFO_ITEMS                                                                                     ///< Number of usage info items.
+} HD_USAGE_INFO_ITEMS_T;
+
 #pragma pack(push, 1)
 /// Polynomial calibration structure
 typedef struct