From 428bb2e9c2a4ec28ace81514d0afd6b71b72f277 Mon Sep 17 00:00:00 2001 From: David Sterba Date: Tue, 15 Jan 2019 17:19:16 +0100 Subject: [PATCH] btrfs-progs: docs: add metadata_uuid description to sect. 5 Signed-off-by: David Sterba --- Documentation/btrfs-man5.asciidoc | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/Documentation/btrfs-man5.asciidoc b/Documentation/btrfs-man5.asciidoc index ddb2e739..c32e77b6 100644 --- a/Documentation/btrfs-man5.asciidoc +++ b/Documentation/btrfs-man5.asciidoc @@ -587,6 +587,13 @@ increased hardlink limit per file in a directory to 65536, older kernels supported a varying number of hardlinks depending on the sum of all file name sizes that can be stored into one metadata block +*metadata_uuid*:: +(since: 5.0) ++ +the main filesystem UUID is the metadata_uuid, which stores the new UUID only +in the superblock while all metadata blocks still have the UUID set at mkfs +time, see `btrfstune`(8) for more + *mixed_backref*:: (since: 2.6.31) +