raise disk size limit on gnt-fsn for collector (team#40535)

howto/ganeti.md

@@ -2798,6 +2798,16 @@ Then the following extra configuration was performed:
 The [network configuration](#network-configuration) (below) must also be performed for the
 address blocks reserved in the cluster.
 
+Cluster limits were changed to raise the disk usage to 2TiB:
+
+```
+gnt-cluster modify --ipolicy-bounds-specs \
+max:cpu-count=8,disk-count=16,disk-size=2097152,\
+memory-size=32768,nic-count=8,spindle-use=12\
+/min:cpu-count=1,disk-count=1,disk-size=1024,\
+memory-size=128,nic-count=1,spindle-use=1
+```
+
 ### New gnt-chi node
 
  1. to create a new box, follow the [cymru new-machine howto](howto/new-machine-cymru)