howto/upgrades.md

@@ -202,7 +202,11 @@ The remaining is the "manual" procedure, the KVM hosts:
 
 The ganeti hosts, using Fabric:
 
-    ./reboot -v --delay-shutdown 1 --delay-hosts 30 -H fsn-node-0{1,2,3,4,5}.torproject.org
+    ./reboot -v --delay-shutdown 1 --delay-hosts 30 -H fsn-node-0{1,2,3,4,5,6,7}.torproject.org
+
+This can be done in parallel across clusters:
+
+    ./reboot -v --delay-shutdown 1 --delay-hosts 30 -H chi-node-0{1,2,3,4}.torproject.org
 
 This is also documented in the [howto/ganeti](howto/ganeti) section. Do not
 forget to rebalance the cluster after the reboot.