diff --git a/firmware/filesystem/util.c b/firmware/filesystem/util.c
index f8b59b9..d0d7244 100644
--- a/firmware/filesystem/util.c
+++ b/firmware/filesystem/util.c
@@ -35,7 +35,7 @@ inline void format_formatDF(void)
 	char buf[512];
 
     memset(buf, 0, 512);
-    for(i=0; i<20; i++) dataflash_write(buf, i, 1);
+    for(i=0; i<100; i++) dataflash_write(buf, i, 1);
 
     memcpy(buf, init1, sizeof(init1));
     memcpy(buf+0x24, init2, sizeof(init2));