.\"	$OpenBSD: newlfs.8,v 1.11 2003/06/02 20:06:16 millert Exp $
.\"	$NetBSD: newlfs.8,v 1.2 1995/03/18 14:58:54 cgd Exp $
.\"
.\" Copyright (c) 1993
.\"	The Regents of the University of California.  All rights reserved.
.\"
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.\" modification, are permitted provided that the following conditions
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.\" 3. Neither the name of the University nor the names of its contributors
.\"    may be used to endorse or promote products derived from this software
.\"    without specific prior written permission.
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.\"     @(#)newlfs.8	8.1 (Berkeley) 6/19/93
.\"
.Dd June 19, 1993
.Dt NEWLFS 8
.Os
.Sh NAME
.Nm newlfs
.Nd construct a new LFS file system
.Sh SYNOPSIS
.Nm newlfs
.Fl L
.Op Fl B Ar segsize
.Op Fl b Ar blocksize
.Op Fl m Ar freespace\&%
.Op Fl s Ar size
.Ar special
.Sh DESCRIPTION
.Nm
builds a log-structured file system on the specified
.Ar special
device, basing its defaults on the information in the disk label.
(Before running
.Nm
the disk must be labeled using
.Xr disklabel 8 . )
.Pp
The following options define the general layout policies:
.Bl -tag -width Fl
.It Fl B Ar segsize
The logical segment size of the file system in bytes.
.It Fl b Ar blocksize
The block size of the file system in bytes.
.It Fl L
Create a log-structured file system (LFS).
This flag is currently required.
.It Fl m Ar freespace\&%
The percentage of space reserved from normal users; the minimum
free space threshold.
The default value used is 10%.
See
.Xr tunefs 8
for more details on how to set this option.
.It Fl s Ar size
The size of the file system in sectors.
.El
.Sh SEE ALSO
.Xr disktab 5 ,
.Xr fs 5 ,
.Xr disklabel 8 ,
.Xr diskpart 8 ,
.Xr dumplfs 8 ,
.Xr tunefs 8
.Rs
.%A M. McKusick
.%A W. Joy
.%A S. Leffler
.%A R. Fabry
.%T A Fast File System for UNIX
.%J ACM Transactions on Computer Systems 2
.%V 3
.%P pp 181-197
.%D August 1984
.%O (reprinted in the BSD System Manager's Manual)
.Re
.Sh HISTORY
The
.Nm
command appeared in
.Bx 4.4 .