note more ... exotic resize cases

tsa/howto/kvm.mdwn

@@ -43,6 +43,11 @@ To *shrink* an image, you need to use the `--shrink` option but, be
 careful: the underlying partitions and filesystems need to first be
 resized otherwise you will have data loss.
 
+Note that this only resizes the disk as seen from the VM. The VM
+itself might have some partitionning on top of that, and you might
+need to do filesystem resizes underneath there, including LVM if
+that's setup there as well. See [[lvm]] for details.
+
 Design
 ======
 

tsa/howto/lvm.mdwn

@@ -69,6 +69,15 @@ extend the physical volume:
 
     pvextend /dev/sdb
 
+Note that if there's an underlying crypto layer, it needs to be
+resized as well:
+
+    cryptsetup resize $DEVICE_LABEL
+
+In this case, the `$DEVICE_LABEL` is the device's name in
+`/etc/crypttab`, *not* the device name. For example, it would be
+`/dev/mapper/crypt_sdb`, not `/dev/sdb`.
+
 See also the [upstream documentation][].
 
 [upstream documentation]: http://www.tldp.org/HOWTO/LVM-HOWTO/extendlv.html