lssu (1) - Linux Manuals
lssu: list usage state of NILFS2 segments
NAME
lssu - list usage state of NILFS2 segmentsSYNOPSIS
lssu [options] [device]DESCRIPTION
lssu is a utility for displaying usage state of NILFS2 segments in device, where a segment is contiguous lump of disk blocks and an allocation unit of NILFS2 disk space. When device is omitted, /proc/mounts is examined to find a NILFS2 file system.This command will fail if the device has no active mounts of a NILFS2 file system.
OPTIONS
- -a
- Do not hide clean segments.
- -i index
- Skip index segments at start of input.
- -n lines
- List only lines input segments.
- -h
- Display help message and exit.
FIELD DESCRIPTION
Every line of the lssu output consists of the following fields:- SEGNUM
- Segment number.
- DATE
- Creation date.
- TIME
- Creation time.
- STAT
-
State of the segment. It consists of three flags whose meaning is
shown below:
-
- a
- The segment is active, meaning that it is recently created and cannot be reclaimed by the garbage collector.
- d
- The segment is dirty, meaning that it is in use.
- e
- The segment is erroneous, meaning that it has once caused an I/O error. NILFS2 avoids allocating the segments with this flag.
-
- NBLOCKS
- Number of in-use blocks of the segment.