| btrfs-map-logical(8) |
| ==================== |
| |
| NAME |
| ---- |
| btrfs-map-logical - map btrfs logical extent to physical extent |
| |
| SYNOPSIS |
| -------- |
| *btrfs-map-logical* <options> <device> |
| |
| DESCRIPTION |
| ----------- |
| *btrfs-map-logical* can be used to find out what the physical offsets are |
| on the mirrors, the result is dumped into stdout in default. |
| |
| Mainly used for debug purpose. |
| |
| OPTIONS |
| ------- |
| -l|--logical <logical_num>:: |
| Logical extent to map. |
| -c|--copy <copy>:: |
| Copy of the extent to read(usually 1 or 2). |
| -o|--output <filename>:: |
| Output file to hold the extent. |
| -b|--bytes <bytes>:: |
| Number of bytes to read. |
| |
| EXIT STATUS |
| ----------- |
| *btrfs-map-logical* will return 0 if no error happened. |
| If any problems happened, 1 will be returned. |
| |
| SEE ALSO |
| -------- |
| `mkfs.btrfs`(8) |
