LSSU

NAME

lssu − list usage state of NILFS2 segments

SYNOPSIS

lssu [options] [device]

DESCRIPTION

lssu is a utility for displaying the usage state of NILFS2 segments in device, where a segment is contiguous lump of disk blocks and is the allocation unit of NILFS2 disk space. When device is omitted, it tries to find a NILFS2 file system from /proc/mounts.

This command is valid only for mounted NILFS2 file systems, and will fail if the device has no active mounts.

OPTIONS

	−a		Do not hide clean 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:

			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 <koji AT osrg DOT net>

AVAILABILITY

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

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