nilfs-tune man page on Manjaro

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NILFS-TUNE(8)							 NILFS-TUNE(8)

NAME
       nilfs-tune - adjust tunable file system parameters on NILFS file system

SYNOPSIS
       nilfs-tune [options] device

DESCRIPTION
       nilfs-tune  is  a  utility  to modify tunable file system parameters on
       NILFS2 file system in device.

       This command is valid for  inactive  NILFS2  file  systems.   Modifying
       active mounts may cause severe damage.

OPTIONS
       -f     Force to modify even the specified file system is mounted.

       -i interval
	      Set the commit interval of segment.

       -m block-max
	      Set  the	threshold  of the data amount of the segment construc‐
	      tion.

       -l     List the contents of the file system superblock,	including  the
	      current  values  of the parameters that can be set via this pro‐
	      gram.

       -L volume-label
	      Set the volume label of the file	system.	  NILFS2  file	system
	      labels  can be at most 80 bytes long.  If volume-label is longer
	      than 80 bytes, nilfs-tune will truncate it.   The	 volume	 label
	      can  be used mount(8) and /etc/fstab(5) (and possibly others) by
	      specifying LABEL=volume-label instead of a block special	device
	      name like /dev/sda5.

       -O [^]feature[,...]
	      Set  or clear the indicated filesystem features (options) in the
	      filesystem.  More than one filesystem feature can be cleared  or
	      set  by  separating  features  with commas.  Filesystem features
	      prefixed with a caret character ('^') will  be  cleared  in  the
	      filesystem's  superblock;	 filesystem  features without a prefix
	      character will be added to the filesystem.

	      The following filesystem feature can be  set  or	cleared	 using
	      nilfs-tune:

	      block_count
		     Enable  block  count  per checkpoint.  After setting this
		     option, fsck should be run on the filesystem to make  the
		     counts right, but no fsck tool is available yet, sorry.

       -U UUID
	      Set  the universally unique identifier (UUID) of the file system
	      to UUID.	The format of the UUID is a series of hex digits sepa‐
	      rated	     by		 hyphens,	   like		 this:
	      "c1b9d5a2-f162-11cf-9ece-0020afc76f16".

       -h     Display help message and exit.

AUTHOR
       Jiro SEKIBA <jir@unicus.jp>

AVAILABILITY
       nilfs-tune is part of the nilfs-utils package  and  is  available  from
       http://nilfs.sourceforge.net.

SEE ALSO
       nilfs(8), lscp(1), chcp(8), mkcp(8), rmcp(8).

nilfs-utils version 2.2		   Apr 2014			 NILFS-TUNE(8)
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