diff --git a/dosfstools-2.11_determine-sector-size.patch b/dosfstools-2.11_determine-sector-size.patch
new file mode 100644
index 0000000..4dda797
--- /dev/null
+++ b/dosfstools-2.11_determine-sector-size.patch
@@ -0,0 +1,35 @@
+--- mkdosfs/mkdosfs.c
++++ mkdosfs/mkdosfs.c
+@@ -1424,6 +1424,7 @@
+   int i = 0, pos, ch;
+   int create = 0;
+   unsigned long long cblocks;
++  int min_sector_size;
+   
+   if (argc && *argv) {		/* What's the program name? */
+     char *p;
+@@ -1712,6 +1713,24 @@
+ 	)
+       die ("Will not try to make filesystem on full-disk device '%s' (use -I if wanted)");
+ 
++  if (sector_size_set)
++    {
++      if (ioctl(dev, BLKSSZGET, &min_sector_size) >= 0)
++          if (sector_size < min_sector_size)
++            {
++	      sector_size = min_sector_size;
++              fprintf(stderr, "Warning: sector size was set to %d (minimal for this device)\n", sector_size);
++            }
++    }
++  else
++    {
++      if (ioctl(dev, BLKSSZGET, &min_sector_size) >= 0)
++        {
++	  sector_size = min_sector_size;
++	  sector_size_set = 1;
++        }
++    }
++
+   establish_params (statbuf.st_rdev,statbuf.st_size);	
+                                 /* Establish the media parameters */
+ 
diff --git a/dosfstools.changes b/dosfstools.changes
index f7f0c34..82ea294 100644
--- a/dosfstools.changes
+++ b/dosfstools.changes
@@ -1,3 +1,10 @@
+-------------------------------------------------------------------
+Thu Sep  6 16:26:57 CEST 2007 - pgajdos@suse.cz
+
+- determine sector size of device automatically or if -S parameter
+  present, verify, that it's not under physical sector size
+  (determine-sector-size.patch) 
+
 -------------------------------------------------------------------
 Thu Aug  9 17:08:41 CEST 2007 - olh@suse.de
 
diff --git a/dosfstools.spec b/dosfstools.spec
index 984d0e7..a022cbe 100644
--- a/dosfstools.spec
+++ b/dosfstools.spec
@@ -17,7 +17,7 @@ Group:          System/Filesystems
 Autoreqprov:    on
 Summary:        Utilities for Making and Checking MS-DOS FAT File Systems on Linux
 Version:        2.11
-Release:        71
+Release:        78
 URL:            ftp://ftp.uni-erlangen.de/pub/Linux/LOCAL/dosfstools
 Source:         %{name}-%{version}.src.tar.bz2
 Patch0:         %{name}-%{version}-linuxfs.patch
@@ -25,6 +25,7 @@ Patch1:         %{name}-%{version}-unaligned.patch
 Patch2:         %{name}-%{version}-buffer.patch
 Patch3:         %{name}-%{version}-o_excl.patch
 Patch4:         %{name}-%{version}-mkdosfs-geo0.diff
+Patch5:         %{name}-%{version}_determine-sector-size.patch
 Obsoletes:      mkdosfs dosfsck dosfstls
 BuildRoot:      %{_tmppath}/%{name}-%{version}-build
 Supplements:    filesystem(vfat)
@@ -49,6 +50,7 @@ Authors:
 %patch2
 %patch3
 %patch4 -p1
+%patch5
 
 %build
 make OPTFLAGS="-D_FILE_OFFSET_BITS=64 -D_LARGEFILE64_SOURCE $RPM_OPT_FLAGS"
@@ -89,6 +91,10 @@ rm -rf $RPM_BUILD_ROOT
 %{_mandir}/man8/*.gz
 
 %changelog
+* Thu Sep 06 2007 - pgajdos@suse.cz
+- determine sector size of device automatically or if -S parameter
+  present, verify, that it's not under physical sector size
+  (determine-sector-size.patch)
 * Thu Aug 09 2007 - olh@suse.de
 - remove inclusion of asm/unaligned.h, use private copy of
   asm-generic/unaligned.h