lssu(1) - f14

1LSSU(1)                     General Commands Manual                    LSSU(1)
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NAME

6       lssu - list usage state of NILFS2 segments
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SYNOPSIS

9       lssu [options] [device]
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DESCRIPTION

12       lssu  is  a  utility  for  displaying usage state of NILFS2 segments in
13       device, where a segment is contiguous lump of disk blocks and an  allo‐
14       cation unit of NILFS2 disk space.  When device is omitted, /proc/mounts
15       is examined to find a NILFS2 file system.
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17       This command will fail if the device has no active mounts of  a  NILFS2
18       file system.
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OPTIONS

21       -a     Do not hide clean segments.
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23       -i index
24              Skip index segments at start of input.
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26       -n lines
27              List only lines input segments.
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29       -h     Display help message and exit.
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FIELD DESCRIPTION

32       Every line of the lssu output consists of the following fields:
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34       SEGNUM Segment number.
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36       DATE   Creation date.
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38       TIME   Creation time.
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40       STAT   State  of the segment.  It consists of three flags whose meaning
41              is shown below:
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43              a      The segment is active, meaning that it is  recently  cre‐
44                     ated and cannot be reclaimed by the garbage collector.
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46              d      The segment is dirty, meaning that it is in use.
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48              e      The segment is erroneous, meaning that it has once caused
49                     an I/O error.  NILFS2 avoids allocating the segments with
50                     this flag.
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52       NBLOCKS
53              Number of in-use blocks of the segment.
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AUTHOR

56       Koji Sato <koji@osrg.net>
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AVAILABILITY

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