From a2906babd18f828bc5a13e99f5cc3f327aadbfe3 Mon Sep 17 00:00:00 2001
From: rfjakob
Date: Thu, 9 Jun 2016 23:41:04 +0200
Subject: Updated Upgrading (markdown)

---
 Upgrading.md | 15 +++++++++++++--
 1 file changed, 13 insertions(+), 2 deletions(-)

diff --git a/Upgrading.md b/Upgrading.md
index 3bd621b..627eef6 100644
--- a/Upgrading.md
+++ b/Upgrading.md
@@ -31,11 +31,22 @@ The bash option `shopt -s dotglob` makes sure that `/old/*` also matches hidden
 
 If you don't have the space to store a copy of your data, you can use the `--remove-source-files` option to rsync. This will delete each file after it has been transferred. Note that `mv` is pretty dumb: it copies everything and only then deletes the source files, so you will still need twice the space.
 
-As mentioned above, make sure you remember the passphrase for `/new` and have the masterkey.
+As mentioned earlier, double-check that you remember the passphrase for `/new` and have the new masterkey saved somewhere before moving the files.
 
 ```
 $ shopt -s dotglob
 $ rsync -av --remove-source-files /old/* /new
 ```
 
-As above, `dotglob` makes sure that dotfiles in `/old/` are copied as well.
\ No newline at end of file
+As above, `dotglob` makes sure that dotfiles in `/old/` are copied as well.
+
+When rsync is finished, it will leave an empty directory tree in `/old`. A safe way to delete these directories is:
+
+```
+find /old -type d -delete
+```
+
+This is safer than `rm -R` because it will only remove directories and error out if any files are left behind. Note that it will also try to delete the mountpoint `/old` and fail at doing so. This is expected:
+```
+find: cannot delete ‘/old’: Device or resource busy
+```
\ No newline at end of file
-- 
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