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LSSU(1)								       LSSU(1)

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	 allo‐
       cation 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  cre‐
		     ated 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 <koji@osrg.net>

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 2.0		   May 2008			       LSSU(1)

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