From: Thomas Lamprecht <t.lamprecht@proxmox.com>
Date: Mon, 5 Jul 2021 12:24:35 +0000 (+0200)
Subject: btrfs: document df weirdness and how to better get usage
X-Git-Url: https://git.proxmox.com/?a=commitdiff_plain;h=00271f41dbff6bfcce1389bd904337c823dc2d64;p=pve-docs.git

btrfs: document df weirdness and how to better get usage

Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>
---

diff --git a/local-btrfs.adoc b/local-btrfs.adoc
index d7a94f7..f68e30d 100644
--- a/local-btrfs.adoc
+++ b/local-btrfs.adoc
@@ -214,3 +214,13 @@ UUID=<uuid of your root file system> / btrfs defaults,compress=zstd 0 1
 ----
 
 This change will take effect after rebooting.
+
+Checking Space Usage
+^^^^^^^^^^^^^^^^^^^^
+
+The classic `df` tool may output confusing values for some btrfs setups.
+For a better estimate use the `btrfs filesystem usage /PATH` command, for example:
+
+----
+# btrfs fi usage /my-storage
+----