#2800 - Better explanation of the --ignore-inode option relevance (#2802)

Fixes #2800

src/borg/archiver.py

@@ -2767,10 +2767,14 @@ class Archiver:
         In the archive name, you may use the following placeholders:
         {now}, {utcnow}, {fqdn}, {hostname}, {user} and some others.
 
-        To speed up pulling backups over sshfs and similar network file systems which do
-        not provide correct inode information the ``--ignore-inode`` flag can be used. This
-        potentially decreases reliability of change detection, while avoiding always reading
-        all files on these file systems.
+        Backup speed is increased by not reprocessing files that are already part of
+        existing archives and weren't modified. Normally, detecting file modifications
+        will take inode information into consideration. This is problematic for files
+        located on sshfs and similar network file systems which do not provide stable
+        inode numbers, such files will always be considered modified. The
+        ``--ignore-inode`` flag can be used to prevent this and improve performance.
+        This flag will reduce reliability of change detection however, with files
+        considered unmodified as long as their size and modification time are unchanged.
 
         The mount points of filesystems or filesystem snapshots should be the same for every
         creation of a new archive to ensure fast operation. This is because the file cache that