diff --git a/libraries/DataFlash/DataFlash_File.cpp b/libraries/DataFlash/DataFlash_File.cpp
index 9125224759..dbfd2739a9 100644
--- a/libraries/DataFlash/DataFlash_File.cpp
+++ b/libraries/DataFlash/DataFlash_File.cpp
@@ -602,7 +602,9 @@ uint16_t DataFlash_File::find_last_log()
     if (fname == nullptr) {
         return ret;
     }
+    hal.scheduler->expect_delay_ms(3000);
     int fd = open(fname, O_RDONLY|O_CLOEXEC);
+    hal.scheduler->expect_delay_ms(0);
     free(fname);
     if (fd != -1) {
         char buf[10];
@@ -736,7 +738,9 @@ int16_t DataFlash_File::get_log_data(const uint16_t list_entry, const uint16_t p
             return -1;
         }
         stop_logging();
+        hal.scheduler->expect_delay_ms(3000);
         _read_fd = ::open(fname, O_RDONLY|O_CLOEXEC);
+        hal.scheduler->expect_delay_ms(0);
         if (_read_fd == -1) {
             _open_error = true;
             int saved_errno = errno;
@@ -912,12 +916,14 @@ uint16_t DataFlash_File::start_new_log(void)
         write_fd_semaphore->give();
         return 0xFFFF;
     }
+    hal.scheduler->expect_delay_ms(3000);
 #if HAL_OS_POSIX_IO
     _write_fd = ::open(_write_filename, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC, 0666);
 #else
     //TODO add support for mode flags
     _write_fd = ::open(_write_filename, O_WRONLY|O_CREAT|O_TRUNC|O_CLOEXEC);
 #endif
+    hal.scheduler->expect_delay_ms(0);
     _cached_oldest_log = 0;
 
     if (_write_fd == -1) {
@@ -941,11 +947,13 @@ uint16_t DataFlash_File::start_new_log(void)
 
     // we avoid fopen()/fprintf() here as it is not available on as many
     // systems as open/write
+    hal.scheduler->expect_delay_ms(3000);
 #if HAL_OS_POSIX_IO
     int fd = open(fname, O_WRONLY|O_CREAT|O_CLOEXEC, 0644);
 #else
     int fd = open(fname, O_WRONLY|O_CREAT|O_CLOEXEC);
 #endif
+    hal.scheduler->expect_delay_ms(0);
     free(fname);
     if (fd == -1) {
         _open_error = true;