diff --git a/src/ingress/ingress.c b/src/ingress/ingress.c
index 5f0fa93a938d0788579055ceb17e00bb35f6bd95..18c8af7bd677fb09cf6554f29ffa2c1b959459ab 100644
--- a/src/ingress/ingress.c
+++ b/src/ingress/ingress.c
@@ -284,7 +284,7 @@ static int ProcessMetricData(IngressMgr *mgr, const char *content, const char *t
         }
     }
 
-    if (mgr->imdbMgr->writeLogsType == METRIC_LOG_PROM || mgr->imdbMgr->writeLogsType == METRIC_LOG_JSON) {
+    if (mgr->imdbMgr->writeLogsType == METRIC_LOG_PROM || mgr->imdbMgr->writeLogsType == METRIC_LOG_JSON || mgr->imdbMgr->writeLogsType == METRIC_LOG_NULL) {
         // save metric to imdb
         rec = IMDB_DataBaseMgrCreateRec(mgr->imdbMgr, table, content);
         if (rec == NULL) {
diff --git a/src/probes/system_infos.probe/system_disk.c b/src/probes/system_infos.probe/system_disk.c
index 867bcfd9cc887364ae99b1c85b5aa5ecf5a23551..36a5064596c8db4887792c495249eba0c865147c 100644
--- a/src/probes/system_infos.probe/system_disk.c
+++ b/src/probes/system_infos.probe/system_disk.c
@@ -33,16 +33,39 @@
 
 static df_stats *g_df_tbl = NULL;
 
+#define MAX_LINE_LEN 1024
+void replace_dash_with_zero(char *line) {
+    char *token = strtok(line, " ");
+    char temp[MAX_LINE_LEN] = {0};
+
+    while (token != NULL) {
+        if (strcmp(token, "-") == 0) {
+            strcat(temp, "0 ");
+        } else {
+            strcat(temp, token);
+            strcat(temp, " ");
+        }
+        token = strtok(NULL, " ");
+    }
+
+    temp[strlen(temp)-1] = '\0';
+    strcpy(line, temp);
+}
+
 #define DF_INODE_FIELD_NUM 7
 static int get_df_inode_fields(char *line, df_stats *stats)
 {
     int ret;
     char format[SSCANF_FORMAT_LEN];
+    char line_copy[MAX_LINE_LEN];
 
-    (void)snprintf(format, sizeof(format), "%%%lus %%%lus %%ld %%ld %%ld %%ld%%*s %%%lus",
+    strncpy(line_copy, line, MAX_LINE_LEN);
+    replace_dash_with_zero(line_copy);
+
+    (void)snprintf(format, sizeof(format), "%%%lus %%%lus %%ld %%ld %%ld %%ld %%%lus",
                    sizeof(stats->fsname) - 1, sizeof(stats->fstype) - 1,
                    sizeof(stats->mount_on) - 1);
-    ret = sscanf(line, format,
+    ret = sscanf(line_copy, format,
         &stats->fsname, &stats->fstype, &stats->inode_sum, &stats->inode_used,
         &stats->inode_free, &stats->inode_used_per, &stats->mount_on);
     if (ret < DF_INODE_FIELD_NUM) {