NAME

       lssu - list usage state of NILFS2 segments

SYNOPSIS

       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, --all
              Do not hide clean segments.

       -h, --help
              Display help message and exit.

       -i index, --index=index
              Skip index segments at start of input.

       -n lines, --lines=lines
              List only lines input segments.

       -V, --version
              Display version 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.

AUTHOR

       Koji Sato

AVAILABILITY

       lssu is part of the nilfs-utils package and is available from http://www.nilfs.org.

SEE ALSO

       nilfs(8), dumpseg(8).

nilfs-utils version 2.1                             May 2011                                             LSSU(1)