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).