The default sectors per cluster calculated by mkdosfs are outdated,
see http://technet.microsoft.com/en-us/library/cc938438.aspx.
The deviations may cause some 3rd party devices (e.g. TechniSat DVB
receivers) to hang when reading mkdosfs generated file systems.
---
src/mkdosfs.c | 14 +++++++-------
1 files changed, 7 insertions(+), 7 deletions(-)
diff --git a/src/mkdosfs.c b/src/mkdosfs.c
index af1e0d1..a3505b4 100644
--- a/src/mkdosfs.c
+++ b/src/mkdosfs.c
@@ -713,18 +713,18 @@ def_hd_params:
}
if (size_fat == 32) {
/* For FAT32, try to do the same as M$'s format command
- * (see http://www.win.tue.nl/~aeb/linux/fs/fat/fatgen103.pdf p.
20):
- * fs size <= 260M: 0.5k clusters
- * fs size <= 8G: 4k clusters
- * fs size <= 16G: 8k clusters
- * fs size > 16G: 16k clusters
+ * (http://technet.microsoft.com/en-us/library/cc938438.aspx):
+ * fs size < 8G: 4k clusters
+ * fs size < 16G: 8k clusters
+ * fs size < 32G: 16k clusters
+ * fs size >= 32G: 32k clusters
*/
unsigned long sz_mb =
(blocks + (1 << (20 - BLOCK_SIZE_BITS)) - 1) >> (20 -
BLOCK_SIZE_BITS);
bs.cluster_size =
- sz_mb > 16 * 1024 ? 32 : sz_mb > 8 * 1024 ? 16 : sz_mb >
- 260 ? 8 : 1;
+ sz_mb >= 32 * 1024 ? 64 : sz_mb >= 16 * 1024 ? 32 : sz_mb >=
+ 8 * 1024 ? 16 : 8;
} else {
/* FAT12 and FAT16: start at 4 sectors per cluster */
bs.cluster_size = (char)4;
--
1.7.3.4
--
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