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.\" ========================================================================
.\"
.IX Title "VOS_BACKUP 1"
.TH VOS_BACKUP 1 "2012-01-23" "OpenAFS" "AFS Command Reference"
.\" For nroff, turn off justification.  Always turn off hyphenation; it makes
.\" way too many mistakes in technical documents.
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.nh
.SH "NAME"
vos_backup \- Creates a backup volume for a single read/write volume
.SH "SYNOPSIS"
.IX Header "SYNOPSIS"
\&\fBvos backup\fR \fB\-id\fR\ <\fIvolume\ name\ or\ \s-1ID\s0\fR>
    [\fB\-cell\fR\ <\fIcell\ name\fR>]
    [\fB\-noauth\fR] [\fB\-localauth\fR] [\fB\-verbose\fR]
    [\fB\-encrypt\fR] [\fB\-noresolve\fR] [\fB\-help\fR]
.PP
\&\fBvos backup\fR \fB\-i\fR\ <\fIvolume\ name\ or\ \s-1ID\s0\fR> [\fB\-c\fR <\fIcell name\fR>]
    [\fB\-noa\fR] [\fB\-l\fR] [\fB\-v\fR] [\fB\-e\fR] [\fB\-nor\fR] [\fB\-h\fR]
.SH "DESCRIPTION"
.IX Header "DESCRIPTION"
The \fBvos backup\fR command clones the indicated read/write volume to create
a backup version, placing it at the same site as the read/write
version. The backup volume's name is the same as the read/write source's
with the addition of the \f(CW\*(C`.backup\*(C'\fR extension. Its volume \s-1ID\s0 number is the
one allocated for it in the Volume Location Database (\s-1VLDB\s0) when the
read/write source was created with the \fBvos create\fR command. If a backup
version already exists, the new clone replaces it.
.PP
To create a backup version of multiple volumes, use the \fBvos backupsys\fR
command.
.SH "OPTIONS"
.IX Header "OPTIONS"
.IP "\fB\-id\fR <\fIvolume name or \s-1ID\s0\fR>" 4
.IX Item "-id <volume name or ID>"
Specifies either the complete name or volume \s-1ID\s0 number of the read/write
source volume.
.IP "\fB\-cell\fR <\fIcell name\fR>" 4
.IX Item "-cell <cell name>"
Names the cell in which to run the command. Do not combine this argument
with the \fB\-localauth\fR flag. For more details, see \fIvos\fR\|(1).
.IP "\fB\-noauth\fR" 4
.IX Item "-noauth"
Assigns the unprivileged identity anonymous to the issuer. Do not combine
this flag with the \fB\-localauth\fR flag. For more details, see \fIvos\fR\|(1).
.IP "\fB\-localauth\fR" 4
.IX Item "-localauth"
Constructs a server ticket using a key from the local
\&\fI/usr/afs/etc/KeyFile\fR file. The \fBvos\fR command interpreter presents it
to the Volume Server and Volume Location Server during mutual
authentication. Do not combine this flag with the \fB\-cell\fR argument or
\&\fB\-noauth\fR flag. For more details, see \fIvos\fR\|(1).
.IP "\fB\-verbose\fR" 4
.IX Item "-verbose"
Produces on the standard output stream a detailed trace of the command's
execution. If this argument is omitted, only warnings and error messages
appear.
.IP "\fB\-encrypt\fR" 4
.IX Item "-encrypt"
Encrypts the command so that the operation's results are not transmitted
across the network in clear text. This option is available in OpenAFS
versions 1.4.11 or later and 1.5.60 or later.
.IP "\fB\-noresolve\fR" 4
.IX Item "-noresolve"
Shows all servers as \s-1IP\s0 addresses instead of the \s-1DNS\s0 name. This is very
useful when the server address is registered as 127.0.0.1 or when dealing
with multi-homed servers. This option is available in OpenAFS
versions 1.4.8 or later and 1.5.35 or later.
.IP "\fB\-help\fR" 4
.IX Item "-help"
Prints the online help for this command. All other valid options are
ignored.
.SH "OUTPUT"
.IX Header "OUTPUT"
The following message confirms that the command succeeded:
.PP
.Vb 1
\&   Created backup volume for I<volume name>
.Ve
.SH "EXAMPLES"
.IX Header "EXAMPLES"
The following example creates a backup version of the volume
\&\f(CW\*(C`user.smith\*(C'\fR.
.PP
.Vb 2
\&   % vos backup user.smith
\&   Created backup volume for user.smith
.Ve
.SH "PRIVILEGE REQUIRED"
.IX Header "PRIVILEGE REQUIRED"
The issuer must be listed in the \fI/usr/afs/etc/UserList\fR file on the
machine specified with the \fB\-server\fR argument and on each database server
machine. If the \fB\-localauth\fR flag is included, the issuer must instead be
logged on to a server machine as the local superuser \f(CW\*(C`root\*(C'\fR.
.SH "SEE ALSO"
.IX Header "SEE ALSO"
\&\fIvos\fR\|(1),
\&\fIvos_backupsys\fR\|(1)
.SH "COPYRIGHT"
.IX Header "COPYRIGHT"
\&\s-1IBM\s0 Corporation 2000. <http://www.ibm.com/> All Rights Reserved.
.PP
This documentation is covered by the \s-1IBM\s0 Public License Version 1.0.  It was
converted from \s-1HTML\s0 to \s-1POD\s0 by software written by Chas Williams and Russ
Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.