"file blocks" -> "disk blocks"

util/install.sh

@@ -580,7 +580,7 @@ function vm_clean {
 
     # Note: you can shrink the .vmdk in vmware using
     # vmware-vdiskmanager -k *.vmdk
-    echo "Zeroing out file blocks for efficient compaction..."
+    echo "Zeroing out disk blocks for efficient compaction..."
     time sudo dd if=/dev/zero of=/tmp/zero bs=1M
     sync ; sleep 1 ; sync ; sudo rm -f /tmp/zero