path: root/Documentation/btrfs-inspect-internal.asciidoc
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Diffstat (limited to 'Documentation/btrfs-inspect-internal.asciidoc')
1 files changed, 36 insertions, 0 deletions
diff --git a/Documentation/btrfs-inspect-internal.asciidoc b/Documentation/btrfs-inspect-internal.asciidoc
index 73c834cb..bbbbc597 100644
--- a/Documentation/btrfs-inspect-internal.asciidoc
+++ b/Documentation/btrfs-inspect-internal.asciidoc
@@ -87,6 +87,42 @@ subvolume itself return it's own tree id (ie. subvol id)
NOTE: The result is undefined for the so-called empty subvolumes (identified by
inode number 2), but such subvolume does not contain any files anyway
+*show-super* [options] <device> [device...]::
+(needs root privileges)
+Show btrfs superblock information stored in devices.
+It is used to print the information of superblock,
+you can specify which mirror to print out.
+By default, every device's first superblock will be printed out.
+Mainly used for debug purpose.
+Print full superblock information.
+Including the system chunk array and backup roots.
+Print information of all superblocks.
+If this option is given, '-i' option will be ignored.
+-i <super_mirror>::::
+Specify which mirror to print out.
+<super_mirror> is between 0 and 2.
+If several '-i <super_mirror>' are given, only the last one is valid.
+Attempt to print the superblock even if no superblock magic is found. May end
+-s <bytenr>::::
+specifiy offset to a superblock in a non-standard location at 'bytenr', useful
+for debugging (disables the '-f' option)
*subvolid-resolve* <subvolid> <path>::
(needs root privileges)