add more upstream issues

howto/ganeti.md

@@ -182,8 +182,8 @@ memory, and compare it with the node's capacity:
 
     watch -n5 -d 'gnt-instance list -o pnode,name,be/vcpus,be/memory,disk_usage,disk_template,status  |  sort; echo; gnt-node list'
 
-The latter does not show disk usage for secondary volume groups, for a
-complete picture of disk usage, use:
+The latter does not show disk usage for secondary volume groups (see
+[upstream issue 1379](https://github.com/ganeti/ganeti/issues/1379)), for a complete picture of disk usage, use:
 
     gnt-node list-storage
 
@@ -802,7 +802,10 @@ above case:
 It's also possible to use the `--no-disk-moves` option to avoid disk
 move operations altogether.
 
-Both workarounds obviously do not correctly balance the cluster...
+Both workarounds obviously do not correctly balance the
+cluster... Note that we have also tried to use `htools:migration` tags
+to workaround that issue, but [those do not seem to work correctly
+either](https://github.com/ganeti/ganeti/issues/1497).
 
 ## Adding and removing addresses on instances