From cf239b9b7ac49db57ad0fc3d4b538396ca2d998a Mon Sep 17 00:00:00 2001
From: Sean Cross <sean@xobs.io>
Date: Wed, 12 Jun 2019 18:56:10 +0800
Subject: [PATCH] mkfat: zero out disk as part of format

Signed-off-by: Sean Cross <sean@xobs.io>
---
 src/mkfat.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/src/mkfat.c b/src/mkfat.c
index 18c3439..8b46560 100644
--- a/src/mkfat.c
+++ b/src/mkfat.c
@@ -159,5 +159,13 @@ int fat12_mkfs(struct pang_io *io, uint32_t bytes) {
         offset += sector_size;
     }
 
+    // Fill in the rest of the disk
+    while (offset < bytes) {
+        if (pang_write(io, offset, mbr, sizeof(mbr)) != sizeof(mbr)) {
+            return -1;
+        }
+        offset += sector_size;
+    }
+
     return 0;
 }
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