Update Bonsai size and behavior (#1005)

* Update Bonsai size and behavior

Signed-off-by: Roland Tyler <roland.tyler@consensys.net>

* Update Bonsai size and behavior

Signed-off-by: Roland Tyler <roland.tyler@consensys.net>

* fix

Signed-off-by: Roland Tyler <roland.tyler@consensys.net>

Author: rolandtyler

docs/Concepts/Data-Storage-Formats.md

@@ -36,7 +36,7 @@ To run a node with Bonsai Tries data storage format, use the command line option
 ### Storage requirements
 
 Forest mode uses significantly more memory than Bonsai. With full archives, forest mode uses an estimated 12 TB of storage,
-while Bonsai with full archives uses an estimated 800 GB of storage.
+while Bonsai with full archives uses an estimated 1100 GB of storage.
 
 ### Accessing data
 
@@ -49,6 +49,11 @@ To prevent this, you can limit how far Bonsai looks back while reconstructing da
 The default limit Bonsai looks back is 512. To change the parameter, use the
 [`--bonsai-maximum-back-layers-to-load`](../Reference/CLI/CLI-Syntax.md#bonsai-maximum-back-layers-to-load) option.
 
+!!! note
+
+    Using `--bonsai-maximum-back-layers-to-load` doesn't affect the size of the database being stored, only how far back to load.
+    This means there is no "safe minimum" value to use with this option.
+
 ### Fast syncing nodes
 
 With forest mode, your node can use [fast synchronization](Node-Types.md#run-a-full-node) as normal.