diff --git a/libraries/DataFlash/DFMessageWriter.cpp b/libraries/DataFlash/DFMessageWriter.cpp
index 2da44baf3a..307457c6bb 100644
--- a/libraries/DataFlash/DFMessageWriter.cpp
+++ b/libraries/DataFlash/DFMessageWriter.cpp
@@ -37,9 +37,6 @@ void DFMessageWriter_DFLogStart::process()
             if (!_dataflash_backend->Log_Write_Format(_dataflash_backend->structure(next_format_to_send))) {
                 return; // call me again!
             }
-            // provide hook to avoid corrupting the APM1/APM2
-            // dataflash by writing too fast:
-            _dataflash_backend->WroteStartupFormat();
             next_format_to_send++;
         }
         _fmt_done = true;
@@ -52,7 +49,6 @@ void DFMessageWriter_DFLogStart::process()
                 return;
             }
             ap = AP_Param::next_scalar(&token, &type);
-            _dataflash_backend->WroteStartupParam();
         }
 
         stage = ls_blockwriter_stage_sysinfo;
diff --git a/libraries/DataFlash/DataFlash.cpp b/libraries/DataFlash/DataFlash.cpp
index 3022ff022e..6c19adc198 100644
--- a/libraries/DataFlash/DataFlash.cpp
+++ b/libraries/DataFlash/DataFlash.cpp
@@ -111,13 +111,6 @@ uint16_t DataFlash_Class::get_num_logs(void) {
     }
     return backends[0]->get_num_logs();
 }
-void DataFlash_Class::Log_Fill_Format(const struct LogStructure *s, struct log_Format &pkt) {
-    if (_next_backend == 0) {
-        // how were we called?!
-        return;
-    }
-    backends[0]->Log_Fill_Format(s, pkt);
-}
 
 void DataFlash_Class::LogReadProcess(uint16_t log_num,
                                      uint16_t start_page, uint16_t end_page,
@@ -189,11 +182,6 @@ void DataFlash_Class::Log_Write_EntireMission(const AP_Mission &mission)
     FOR_EACH_BACKEND(Log_Write_EntireMission(mission));
 }
 
-void DataFlash_Class::Log_Write_Format(const struct LogStructure *s)
-{
-    FOR_EACH_BACKEND(Log_Write_Format(s));
-}
-
 void DataFlash_Class::Log_Write_Message(const char *message)
 {
     FOR_EACH_BACKEND(Log_Write_Message(message));
diff --git a/libraries/DataFlash/DataFlash.h b/libraries/DataFlash/DataFlash.h
index 77c078e8c4..c22376fcda 100644
--- a/libraries/DataFlash/DataFlash.h
+++ b/libraries/DataFlash/DataFlash.h
@@ -88,7 +88,7 @@ public:
 
     void StartNewLog(void);
     void EnableWrites(bool enable);
-    void Log_Write_Format(const struct LogStructure *structure);
+
     void Log_Write_Parameter(const char *name, float value);
     void Log_Write_GPS(const AP_GPS &gps, uint8_t instance, int32_t relative_alt);
     void Log_Write_RFND(const RangeFinder &rangefinder);
@@ -149,11 +149,6 @@ public:
 
     void periodic_tasks(); // may want to split this into GCS/non-GCS duties
 
-    // this is out here for the trickle-startup-messages logging.
-    // Think before calling.
-    bool Log_Write_Parameter(const AP_Param *ap, const AP_Param::ParamToken &token, 
-                             enum ap_var_type type);
-
     vehicle_startup_message_Log_Writer _vehicle_messages;
 
     // parameter support
@@ -166,10 +161,6 @@ public:
     const struct LogStructure *structure(uint16_t num) const;
 
 protected:
-    void Log_Fill_Format(const struct LogStructure *structure, struct log_Format &pkt);
-
-    void WroteStartupFormat();
-    void WroteStartupParam();
 
     const struct LogStructure *_structures;
     uint8_t _num_types;
diff --git a/libraries/DataFlash/DataFlash_Backend.h b/libraries/DataFlash/DataFlash_Backend.h
index 27313cbf11..b89a7b1751 100644
--- a/libraries/DataFlash/DataFlash_Backend.h
+++ b/libraries/DataFlash/DataFlash_Backend.h
@@ -55,9 +55,6 @@ public:
     void EnableWrites(bool enable) { _writes_enabled = enable; }
     bool logging_started(void) const { return log_write_started; }
 
-    // initialisation this really shouldn't take structure and
-    // num_types, however the CLI LogReadProcess function requires it.
-    // That function needs to be split.
     virtual void Init() {
         _writes_enabled = true;
     }
@@ -86,9 +83,6 @@ public:
     uint8_t num_types() const;
     const struct LogStructure *structure(uint8_t structure) const;
 
-    virtual void WroteStartupFormat() { }
-    virtual void WroteStartupParam() { }
-
     void Log_Write_EntireMission(const AP_Mission &mission);
     bool Log_Write_Format(const struct LogStructure *structure);
     bool Log_Write_MavCmd(uint16_t cmd_total, const mavlink_mission_item_t& mav_cmd);