path: root/Documentation
diff options
authorDavid Sterba <>2016-03-09 14:55:11 +0100
committerDavid Sterba <>2016-03-14 13:42:47 +0100
commit28d924290efd139b7c6c04452cc039b54cd50006 (patch)
tree3c1b4f37454031ff2716732c7578899282454680 /Documentation
parentd3257893d56f02eeb62d54d882c10d1420073f0a (diff)
btrfs-progs: docs: update check options
Signed-off-by: David Sterba <>
Diffstat (limited to 'Documentation')
1 files changed, 9 insertions, 3 deletions
diff --git a/Documentation/btrfs-check.asciidoc b/Documentation/btrfs-check.asciidoc
index 327a45d6..7371a23c 100644
--- a/Documentation/btrfs-check.asciidoc
+++ b/Documentation/btrfs-check.asciidoc
@@ -25,8 +25,12 @@ OPTIONS
-s|--super <superblock>::
use <superblock>th superblock copy, valid values are 0 up to 2 if the
respective superblock offset is within the filesystem
+use the first backup roots stored in the superblock that is valid
try to repair the filesystem
+run in read-only mode (default)
create a new CRC tree and recalculate all checksums
@@ -37,10 +41,12 @@ verify checksums of data blocks
indicate progress at various checking phases
verify qgroup accounting and compare against filesystem accounting
---subvol-extents <subvolid>::
-show extent state for a subvolume
---tree-root <bytenr>::
+-E|--subvol-extents <subvolid>::
+show extent state for the given subvolume
+-r|--tree-root <bytenr>::
use the given bytenr for the tree root
+--chunk-root <bytenr>::
+use the given bytenr for the chunk tree root