howto/upgrades.md

@@ -153,7 +153,7 @@ The remaining is the "manual" procedure, the KVM hosts:
 
 The ganeti hosts, using Fabric:
 
-    ./reboot -v -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}.torproject.org
 
 The scaleway box needs special handholding, see [ticket 32920](https://bugs.torproject.org/32920). The
 windows boxes should normally not need a reboot.