Lssu (1) Linux Manual Page

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 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.net>

AVAILABILITY

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

lssu (1) Linux Manual Page