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 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 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.