diff options
Diffstat (limited to 'cmds-device.c')
| -rw-r--r-- | cmds-device.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/cmds-device.c b/cmds-device.c index ba0e4368..3e053d9e 100644 --- a/cmds-device.c +++ b/cmds-device.c @@ -372,8 +372,10 @@ out: } static const char * const cmd_device_stats_usage[] = { - "btrfs device stats [-z] <path>|<device>", - "Show current device IO stats.", + "btrfs device stats [options] <path>|<device>", + "Show device IO error statistics", + "Show device IO error statistics for all devices of the given filesystem", + "identified by PATH or DEVICE. The filesystem must be mounted.", "", "-z|--reset show current stats and reset values to zero", "-s return non-zero if any stat counter is not zero", |