| 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. |
| |
| 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) |