.\" Copyright (c) 2007 The DragonFly Project.  All rights reserved.
.\" 
.\" This code is derived from software contributed to The DragonFly Project
.\" by Matthew Dillon <dillon@backplane.com>
.\" 
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.\" $DragonFly: src/sbin/mount_hammer/mount_hammer.8,v 1.4 2007/12/14 23:16:55 swildner Exp $
.Dd October 10, 2007
.Dt MOUNT_HAMMER 8
.Os
.Sh NAME
.Nm mount_hammer
.Nd mount a HAMMER file system
.Sh SYNOPSIS
.Nm
.Op Fl o Ar mount-options
.Op Fl T Ar time
.Ar special ...
.Ar mount-point
.Sh DESCRIPTION
The
.Nm
utility mounts a HAMMER filesystem backed by one or more block devices.
.Pp
The options are as follows:
.Bl -tag -width indent
.It Fl o Ar mount-options
Specify mount options, which are a comma delimited set of options (see
.Xr mount 8 ) .
Supported mount options are:
.Bl -tag -width indent
.It Ar ro
Issue a read-only mount.
.El
.It Fl T Ar time
Mount the filesystem as-of a particular
.Ar time .
The mount will automatically be made read-only.
The
.Ar time
may be specified two ways.
A single integer followed by
.Sq s ,
.Sq m ,
.Sq h ,
.Sq D ,
.Sq M ,
or
.Sq Y
issues a historical mount as-of a number of seconds, minutes, hours, days,
months, or years ago.
A time specification of
.Pf yyyymmdd Oo :hhmmss Oc Ns Op .fractional
specifies an exact as-of timestamp in local (not UTC) time.
Set the TZ environment variable prior to running
.Nm
if you wish to specify the time by some other means.
.El
.\".Sh NOTES
.Sh EXAMPLES
.Bd -literal -offset indent
mount_hammer -o ro,noatime /dev/ad0s1d /dev/ad1s1d /mnt
.Ed
.Pp
Mount a hammer filesystem made up of two volumes onto
.Pa /mnt .
.Sh DIAGNOSTICS
Exit status is 0 on success and 1 on error.
.Sh SEE ALSO
.Xr disklabel 8 ,
.Xr fdisk 8 ,
.Xr newfs_hammer 8
.Sh HISTORY
The
.Nm
utility first appeared in
.Dx 1.11 .
.Sh AUTHORS
.An Matthew Dillon Aq dillon@backplane.com