--- app_mixmonitor.c	2013-07-08 17:25:26.000000000 +0530
+++ app_mixmonitor.c	2013-10-05 11:06:55.000000000 +0530
@@ -332,6 +332,8 @@
 					ext = "raw";
 
 				if (!(*fs = ast_writefile(mixmonitor->filename, ext, NULL, oflags, 0, 0666))) {
+					/* set channel variable */
+					pbx_builtin_setvar_helper(mixmonitor->autochan->chan, "MIXMONITOR_STATUS", "ERROR");
 					ast_log(LOG_ERROR, "Cannot open %s.%s\n", mixmonitor->filename, ext);
 					errflag = 1;
 				}
@@ -342,7 +344,13 @@
 				struct ast_frame *cur;
 
 				for (cur = fr; cur; cur = AST_LIST_NEXT(cur, frame_list)) {
-					ast_writestream(*fs, cur);
+					/* check writestream result and set channel variable if any error */
+					if(ast_writestream(*fs, cur) < 0){
+						pbx_builtin_setvar_helper(mixmonitor->autochan->chan, "MIXMONITOR_STATUS", "ERROR");
+						ast_log(LOG_ERROR, "Cannot write frame %s.%s\n", mixmonitor->filename, mixmonitor->autochan->chan->name);
+						errflag = 1;
+					}
+
 				}
 			}
 			ast_mutex_unlock(&mixmonitor->mixmonitor_ds->lock);
@@ -488,8 +496,8 @@
 		return;
 	}
 
-
-	/* Initialize the file if not already done so */
+	/* Initialize the file now for immediate recordings */
+	if (!ast_test_flag(mixmonitor, MUXFLAG_BRIDGED))
 	{
 		struct ast_filestream **fs = NULL;
 		unsigned int oflags;
@@ -506,14 +514,20 @@
 		else
 			ext = "raw";
 
+		/* check writestream result. writestram with 0bytes is successfull even if disk is full.
+		 * ast_truncstream returns error if disk is full */
 		if (!(*fs = ast_writefile(mixmonitor->filename, ext, NULL, oflags, 0, 0666))) {
 			ast_log(LOG_ERROR, "Cannot open %s.%s\n", mixmonitor->filename, ext);
 			pbx_builtin_setvar_helper(chan, "MIXMONITOR_STATUS", "ERROR");
 		}
+		else if (ast_truncstream(*fs) < 0) {
+			ast_log(LOG_ERROR, "Cannot open %s.%s\n", mixmonitor->filename, ext);
+			pbx_builtin_setvar_helper(chan, "MIXMONITOR_STATUS", "ERROR");
+		}
 		else
 			pbx_builtin_setvar_helper(chan, "MIXMONITOR_STATUS", "OK");
-
 	}
+
 	ast_pthread_create_detached_background(&thread, NULL, mixmonitor_thread, mixmonitor);
 }