nilfs-tune man page on Archlinux

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

       nilfs-tune [options] device

       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.

       -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‐

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

       -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

		     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:

       -h     Display help message and exit.

       Jiro SEKIBA <>

       nilfs-tune is part of the nilfs-utils package  and  is  available  from

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

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

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