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Diffstat (limited to 'Documentation/btrfs-show-super.asciidoc')
| -rw-r--r-- | Documentation/btrfs-show-super.asciidoc | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/Documentation/btrfs-show-super.asciidoc b/Documentation/btrfs-show-super.asciidoc new file mode 100644 index 00000000..8866c940 --- /dev/null +++ b/Documentation/btrfs-show-super.asciidoc @@ -0,0 +1,54 @@ +btrfs-show-super(8) +==================== + +NAME +---- +btrfs-show-super - show btrfs superblock information stored in devices + +SYNOPSIS +-------- +*btrfs-show-super* [options] <dev> [<dev>...] + +DESCRIPTION +----------- +*btrfs-show-super* 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. + +OPTIONS +------- +-f:: +Print full superblock information. ++ +Including the system chunk array and backup roots. + +-a:: +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. + +-F:: +Attempt to print the superblock even if no superblock magic is found. May end +badly. + +-s <bytenr>:: +specifiy offset to a superblock in a non-standard location at 'bytenr', useful +for debugging (disables the '-f' option) + +EXIT STATUS +----------- +*btrfs-show-super* will return 0 if no error happened. +If any problems happened, 1 will be returned. + +SEE ALSO +-------- +`mkfs.btrfs`(8) |