From e6cec73c8f443d7ce445170569c97ef10c8f7e91 Mon Sep 17 00:00:00 2001
From: Axel Burri <axel@tty0.ch>
Date: Fri, 16 Apr 2021 14:55:58 +0200
Subject: [PATCH] documentation: README.md: mention btr_pool mount point

---
 README.md | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/README.md b/README.md
index bcd43e5..3a62690 100644
--- a/README.md
+++ b/README.md
@@ -89,6 +89,14 @@ This will read all btrfs information on the source/target filesystems
 and show what actions would be performed (without writing anything to
 the disks).
 
+The examples below assume that the btrfs subvolume containing `home`
+and `rootfs` is mounted at `/mnt/btr_pool`. This is usually the btrfs
+root subvolume, which always has `subvolid=5`.
+
+/etc/fstab:
+
+    /dev/sda1  /mnt/btr_pool  btrfs  subvolid=5,noatime  0 0
+
   [btrbk.conf(5)]: https://digint.ch/btrbk/doc/btrbk.conf.5.html