From: Robert Pengelly <robertapengelly@hotmail.com>
Date: Sat, 15 Jun 2024 21:44:13 +0000 (+0100)
Subject: Looks like heads per cylinder needs - 1
X-Git-Url: https://git.candlhat.org/?a=commitdiff_plain;h=bbeb201d0d9db9e4cdcb323fcbf2b772346a4e94;p=dosfstools.git

Looks like heads per cylinder needs - 1
---

diff --git a/mkfs.c b/mkfs.c
index 3113607..3fde2fe 100644
--- a/mkfs.c
+++ b/mkfs.c
@@ -1009,7 +1009,7 @@ static void write_reserved (void) {
     }
     
     write721_to_byte_array (bs.sectors_per_track, sectors_per_track);
-    write721_to_byte_array (bs.heads_per_cylinder, heads_per_cylinder);
+    write721_to_byte_array (bs.heads_per_cylinder, ((heads_per_cylinder >= 4) ? (heads_per_cylinder - 1) : heads_per_cylinder));
     write741_to_byte_array (bs.hidden_sectors, hidden_sectors);
     
     if (total_sectors > USHRT_MAX) {