diff --git a/cmdline/util.c b/cmdline/util.c
index de789666..4a52fa8b 100644
--- a/cmdline/util.c
+++ b/cmdline/util.c
@@ -68,9 +68,39 @@ void* malloc_nofail_test(size_t size)
 	return ptr;
 }
 
+/**
+ * Fast memory test.
+ *
+ * It's similat at raid_mtest_vector() but faster because
+ * we have a lot of buffers to verify.
+ */
+static int fast_mtest_vector(int n, size_t size, void** vv)
+{
+	int i, j;
+
+	/* test with all the bits */
+	for (i = 0; i < 8; ++i) {
+		unsigned char value = 1 << i;
+
+		/* fill first */
+		memset(vv[0], value, size);
+
+		/* copy to the next */
+		for (j = 1; j < n; ++j)
+			memcpy(vv[j], vv[j-1], size);
+
+		/* compare with the previous */
+		for (j = 1; j <= n; ++j)
+			if (memcmp(vv[j % n], vv[j-1], size) != 0)
+				return -1;
+	}
+
+	return 0;
+}
+
 void mtest_vector(int n, size_t size, void** vv)
 {
-	if (raid_mtest_vector(n, size, vv) != 0) {
+	if (fast_mtest_vector(n, size, vv) != 0) {
 		/* LCOV_EXCL_START */
 		log_fatal("DANGER! Your RAM memory is broken! DO NOT PROCEED UNTIL FIXED!\n");
 		log_fatal("Try running a memory test like http://www.memtest86.com/\n");