1.\" Copyright (c) 2007 The DragonFly Project. All rights reserved. 2.\" 3.\" This code is derived from software contributed to The DragonFly Project 4.\" by Matthew Dillon <dillon@backplane.com> 5.\" 6.\" Redistribution and use in source and binary forms, with or without 7.\" modification, are permitted provided that the following conditions 8.\" are met: 9.\" 10.\" 1. Redistributions of source code must retain the above copyright 11.\" notice, this list of conditions and the following disclaimer. 12.\" 2. Redistributions in binary form must reproduce the above copyright 13.\" notice, this list of conditions and the following disclaimer in 14.\" the documentation and/or other materials provided with the 15.\" distribution. 16.\" 3. Neither the name of The DragonFly Project nor the names of its 17.\" contributors may be used to endorse or promote products derived 18.\" from this software without specific, prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22.\" LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23.\" FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 24.\" COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25.\" INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 26.\" BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 27.\" LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28.\" AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29.\" OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 30.\" OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31.\" SUCH DAMAGE. 32.\" 33.\" $DragonFly: src/sbin/newfs_hammer/newfs_hammer.8,v 1.2 2007/11/01 22:26:37 dillon Exp $ 34.Dd September 10, 2007 35.Dt NEWFS_HAMMER 8 36.Os 37.Sh NAME 38.Nm newfs_hammer 39.Nd construct a new HAMMER file system 40.Sh SYNOPSIS 41.Nm 42.Fl L Ar label 43.Op Fl c Ar clusize 44.Op Fl S 45.Op Fl U Ar uuid 46.Ar special 47.Op special... 48.Sh DESCRIPTION 49The 50.Nm 51utility creates a HAMMER filesystem on device 52.Ar special . 53If multiple devices are specified a single HAMMER filesystem is created 54which spans all of them. HAMMER filesystems are sector-size agnostic, 55however the 56.DX 57implementation requires the sector size to be no larger then 16K. 58HAMMER filesystems start at a relative offset of 0 and may only be created 59under out-of-band disk labels (disklabel64 or gpt labels), or in standard 60disklabel partitions which do not overlap the label area. 61.Pp 62The options are as follow: 63.Bl -tag -width indent 64.It Fl L Ar label 65All HAMMER filesystems must be named and names should be unique on a 66per-machine basis. 67.It Fl U Ar uuid 68All HAMMER filesystems are assigned a globally unique UUID. If no UUID 69is specified one will be synthesized. 70.It Fl S 71Force the HAMMER filesystem to be formatted with a supercluster layer, 72allowing it to support volumes greater then 2TB. This option is automatically 73enabled if formatting HAMMER on a large disk. 74.It Fl c Ar clusize 75HAMMER organizes file objects in clusters and supeclusters. Clusters 76default to the maximum size, which is 64MB. A smaller size may be chosen 77if desired. This option is not recommended. HAMMER will use a truncated 78cluster as the last cluster and still use all available disk space 79regardless of the cluster size. 80.El 81.Sh NOTES 82.Sh EXAMPLES 83.Bd -literal -offset indent 84newfs_hammer -L Home /dev/ad0s1d 85.Ed 86.Pp 87Create a file system named 'Home' on 88.Pa /dev/ad0s1d . 89.Sh DIAGNOSTICS 90Exit status is 0 on success and 1 on error. 91.Sh SEE ALSO 92.Xr disklabel 8 , 93.Xr fdisk 8 , 94.Xr newfs 8 95.Sh HISTORY 96The 97.Nm 98utility first appeared in 99.Dx 2.0 . 100.Sh AUTHORS 101.An Matthew Dillon Aq dillon@backplane.com . 102