X-Git-Url: http://git.annexia.org/?a=blobdiff_plain;f=resize%2Fvirt-resize.pod;h=abf190e6ee88d9df281ce25ee2a6577d8825baba;hb=c55bad93fbde03a3daa6058913f02098c45e55f5;hp=4ce3a4eabdc7ad58133a77303d628b624f120719;hpb=2910413850c7d9e8df753afad179e415f0638d6d;p=libguestfs.git

diff --git a/resize/virt-resize.pod b/resize/virt-resize.pod
index 4ce3a4e..abf190e 100644
--- a/resize/virt-resize.pod
+++ b/resize/virt-resize.pod
@@ -238,6 +238,27 @@ Similarly, to get non-sparse raw output use:
 (on older systems that don't have the L<fallocate(1)> command use
 C<dd if=/dev/zero of=outdisk bs=1M count=..>)
 
+=head2 LOGICAL PARTITIONS
+
+Logical partitions (a.k.a. C</dev/sda5+> on disks using DOS partition
+tables) cannot be resized.
+
+To understand what is going on, firstly one of the four partitions
+C</dev/sda1-4> will have MBR partition type C<05> or C<0f>.  This is
+called the B<extended partition>.  Use L<virt-filesystems(1)> to see
+the MBR partition type.
+
+Logical partitions live inside the extended partition.
+
+The extended partition can be expanded, but not shrunk (unless you
+force it, which is not advisable).  When the extended partition is
+copied across, all the logical partitions contained inside are copied
+over implicitly.  Virt-resize does not look inside the extended
+partition, so it copies the logical partitions blindly.
+
+You cannot specify a logical partition (C</dev/sda5+>) at all on the
+command line.  Doing so will give an error.
+
 =head1 OPTIONS
 
 =over 4
@@ -707,4 +728,4 @@ GNU General Public License for more details.
 
 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.