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<!DOCTYPE HTML PUBLIC "-//IETF//DTD HTML 4//EN">
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<HTML><HEAD>
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<TITLE>Administration Reference</TITLE>
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<!-- /tmp/idwt3672/auarf000.scr converted by idb2h R4.2 (359) ID -->
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<!-- Workbench Version (AIX) on 3 Oct 2000 at 16:18:30 -->
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<META HTTP-EQUIV="updated" CONTENT="Tue, 03 Oct 2000 16:18:29">
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<META HTTP-EQUIV="review" CONTENT="Wed, 03 Oct 2001 16:18:29">
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<!-- (C) IBM Corporation 2000. All Rights Reserved -->
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<A NAME="Top_Of_Page"></A>
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<H1>Administration Reference</H1>
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<HR><P ALIGN="center"> <A HREF="../index.htm"><IMG SRC="../books.gif" BORDER="0" ALT="[Return to Library]"></A> <A HREF="auarf002.htm#ToC"><IMG SRC="../toc.gif" BORDER="0" ALT="[Contents]"></A> <A HREF="auarf071.htm"><IMG SRC="../prev.gif" BORDER="0" ALT="[Previous Topic]"></A> <A HREF="#Bot_Of_Page"><IMG SRC="../bot.gif" BORDER="0" ALT="[Bottom of Topic]"></A> <A HREF="auarf073.htm"><IMG SRC="../next.gif" BORDER="0" ALT="[Next Topic]"></A> <A HREF="auarf284.htm#HDRINDEX"><IMG SRC="../index.gif" BORDER="0" ALT="[Index]"></A> <P>
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<P>
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<H2><A NAME="HDRBK_DISKRESTORE" HREF="auarf002.htm#ToC_86">backup diskrestore</A></H2>
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<A NAME="IDX4296"></A>
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<A NAME="IDX4297"></A>
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<A NAME="IDX4298"></A>
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<A NAME="IDX4299"></A>
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<A NAME="IDX4300"></A>
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<A NAME="IDX4301"></A>
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<P><STRONG>Purpose</STRONG>
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<P>Restores the entire contents of a partition
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<P><STRONG>Synopsis</STRONG>
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<PRE><B>backup diskrestore -server</B> <<VAR>machine to restore</VAR>>
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<B>-partition</B> <<VAR>partition to restore</VAR>>
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[<B>-portoffset</B> <<VAR>TC port offset</VAR>><SUP>+</SUP>]
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[-<B>newserver</B> <<VAR>destination machine</VAR>>]
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[<B>-newpartition</B> <<VAR>destination partition</VAR>>]
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[<B>-extension</B> <<VAR>new volume name extension</VAR>>]
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[<B>-n</B>] [<B>-localauth</B>] [<B>-cell</B> <<VAR>cell name</VAR>>] [<B>-help</B>]
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<B>backup di -s</B> <<VAR>machine to restore</VAR>> <B>-pa</B> <<VAR>partition to restore</VAR>>
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[<B>-po</B> <<VAR>TC port offset</VAR>><SUP>+</SUP>] [<B>-news</B> <<VAR>destination machine</VAR>>]
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[<B>-newp</B> <<VAR>destination partition</VAR>>] [<B>-e</B> <<VAR>new volume name extension</VAR>>]
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[<B>-n</B>] [<B>-l</B>] [<B>-c</B> <<VAR>cell name</VAR>>] [<B>-h</B>]
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</PRE>
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<P><STRONG>Description</STRONG>
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<P>The <B>backup diskrestore</B> command restores all of the volumes for
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which the Volume Location Database (VLDB) lists a read/write site on the
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partition specified with the <B>-server</B> and <B>-partition</B>
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arguments. It is useful if a disk or machine failure corrupts or
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destroys the data on an entire partition. (To restore any read-only or
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backup volumes that resided on the partition, use the <B>vos release</B>
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and <B>vos backup</B> commands, respectively, after restoring the
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read/write version.)
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<P>If restoring only selected volumes to a single site, it is usually more
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efficient to use the <B>backup volrestore</B> command. To restore
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multiple volumes to many different sites, use the <B>backup
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volsetrestore</B> command.
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<P>(If the <B>FILE YES</B> instruction appears in the
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<B>/usr/afs/backup/CFG_</B><VAR>device_name</VAR> file on the Tape
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Coordinator machine associated with the specified port offset, then the Backup
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System restores data from the backup data file listed for that port offset in
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the Tape Coordinator's <B>/usr/afs/backup/tapeconfig</B> file,
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instead of from tape. For the sake of clarity, the following text
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refers to tapes only, but the Backup System handles backup data files in much
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the same way.)
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<P>The Backup System determines whether the read/write or backup version of
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each volume was dumped more recently, and restores the dumps of that version,
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starting with the most recent full dump. It resets the creation
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timestamp of each restored volume to the date and time at which it begins
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restoring the volume (the creation timestamp appears in the
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<TT>Creation</TT> field of the output from the <B>vos examine</B> and
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<B>vos listvol</B> commands).
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<P>If all of the full and incremental dumps of all relevant volumes were not
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written on compatible tape devices, use the <B>-portoffset</B> argument to
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list multiple port offset numbers in the order in which the tapes are needed
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(first list the port offset for the full dump, second the port offset for the
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level 1 incremental dump, and so on). This implies that the full dumps
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of all relevant volumes must have been written to a type of tape that the
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first Tape Coordinator can read, the level 1 incremental dumps to a type of
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tape the second Tape Coordinator can read, and so on. If dumps are on
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multiple incompatible tape types, use the <B>backup volrestore</B> command
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to restore individual volumes, or the <B>backup volsetrestore</B> command
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after defining groups of volumes that were dumped to compatible tape
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types. For further discussion, see the <I>IBM AFS Administration
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Guide</I>.
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<P>By default, the Backup System restores the contents of the specified
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partition to that same partition. To restore the contents to an
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alternate site, combine the following options as indicated. The Backup
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System removes each volume from the original site, if it still exists, and
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records the change of site in the VLDB.
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<UL>
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<P><LI>To restore to a different partition on the same file server machine,
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provide the <B>-newpartition</B> argument.
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<P><LI>To restore to the partition with the same name on a different file server
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machine, provide the <B>-newserver</B> argument.
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<P><LI>To restore to a completely different site, combine the
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<B>-newserver</B> and <B>-newpartition</B> arguments.
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</UL>
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<P>By default, the Backup System overwrites the contents of existing volumes
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with the restored data. To create a new volume to house the restored
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data instead, use the <B>-extension</B> argument. The Backup System
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creates the new volume at the site designated by the <B>-newserver</B> and
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<B>-newpartition</B> arguments if they are used or the <B>-server</B>
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and <B>-partition</B> arguments otherwise. It derives the volume
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name by adding the extension to the read/write base name listed in the VLDB,
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and creates a new VLDB entry. The command does not affect the existing
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volume in any way. However, if a volume with the specified extension
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also already exists, the command overwrites it.
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<P>To print out a list of the tapes containing the needed dumps, without
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actually performing the restore operation, include the <B>-n</B> flag
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along with the other options to be used on the actual command.
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<P>The Tape Coordinator's default response to this command is to access
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the first tape it needs by invoking the <B>MOUNT</B> instruction in the
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local <B>CFG_</B><VAR>device_name</VAR> file, or by prompting the backup
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operator to insert the tape if there is no <B>MOUNT</B>
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instruction. However, if the <B>AUTOQUERY NO</B> instruction
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appears in the <B>CFG_</B><VAR>device_name</VAR> file, or if the issuer of
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the <B>butc</B> command included the <B>-noautoquery</B> flag, the
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Tape Coordinator instead expects the tape to be in the device already.
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If it is not, or is the wrong tape, the Tape Coordinator invokes the
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<B>MOUNT</B> instruction or prompts the operator. It also invokes
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the <B>MOUNT</B> instruction or prompts for any additional tapes needed to
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complete the restore operation; the backup operator must arrange to
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provide them.
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<P><STRONG>Cautions</STRONG>
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<P>If issuing this command to recover data after a disk crash or other damage,
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be sure not to issue the <B>vos syncserv</B> command first. Doing
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so destroys the VLDB record of the volumes that resided on the
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partition.
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<P><STRONG>Options</STRONG>
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<DL>
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<P><DT><B>-server
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</B><DD>Names the file server machine that the VLDB lists as the site of the
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volumes that need to be restored.
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<P><DT><B>-partition
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</B><DD>Names the partition that the VLDB lists as the site of the volumes that
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need to be restored.
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<P><DT><B>-portoffset
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</B><DD>Specifies one or more port offset numbers (up to a maximum of 128), each
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corresponding to a Tape Coordinator to use in the operation. If there
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is more than one value, the Backup System uses the first one when restoring
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the full dump of each volume, the second one when restoring the level 1
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incremental dump of each volume, and so on. It uses the final value in
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the list when restoring dumps at the corresponding depth in the dump hierarchy
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and at all lower levels.
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<P>Provide this argument unless the default value of 0 (zero) is appropriate
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for all dumps. If <B>0</B> is just one of the values in the list,
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provide it explicitly in the appropriate order.
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<P><DT><B>-newserver
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</B><DD>Names an alternate file server machine to which to restore the
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volumes. If this argument is omitted, the volumes are restored to the
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file server machine named by the <B>-server</B> argument.
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<P><DT><B>-newpartition
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</B><DD>Names an alternate partition to which to restore the data. If this
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argument is omitted, the volumes are restored to the partition named by the
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<B>-partition</B> argument.
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<P><DT><B>-extension
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</B><DD>Creates a new volume for each volume being restored, to house the restored
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data. The Backup System derives the new volume's name by appending
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the specified string to the read/write base name listed in the VLDB, and
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creates a new VLDB volume entry. The Backup System preserves the
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contents of the volumes on the partition, if any still exist. Any
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string other than <B>.readonly</B> or <B>.backup</B> is
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acceptable, but the combination of the base name and extension cannot exceed
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22 characters in length. To use a period to separate the extension from
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the name, specify it as the first character of the string (as in
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<B>.rst</B>, for example).
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<P><DT><B>-n
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</B><DD>Displays a list of the tapes necessary to perform the requested restore,
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without actually performing the operation.
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<P><DT><B>-localauth
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</B><DD>Constructs a server ticket using a key from the local
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<B>/usr/afs/etc/KeyFile</B> file. The <B>backup</B> command
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interpreter presents it to the Backup Server, Volume Server and VL Server
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during mutual authentication. Do not combine this flag with the
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<B>-cell</B> argument. For more details, see the introductory
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<B>backup</B> reference page.
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<P><DT><B>-cell
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</B><DD>Names the cell in which to run the command. Do not combine this
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argument with the <B>-localauth</B> flag. For more details, see the
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introductory <B>backup</B> reference page.
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<P><DT><B>-help
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</B><DD>Prints the online help for this command. All other valid options
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are ignored.
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</DL>
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<P><STRONG>Output</STRONG>
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<P>If a tape error occurs during the restore operation, the Tape Coordinator
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displays the following messages:
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<PRE> Restore operation on volume <VAR>name</VAR> failed due to tape error
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Do you want to continue (y/n)?
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</PRE>
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<P>where <VAR>name</VAR> is the name of the volume that was being restored when
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the tape error occurred. Enter the value <B>y</B> to continue the
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operation without restoring the indicated volume or the value <B>n</B> to
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terminate the operation. In the latter case, the operator can then
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attempt to determine the cause of the tape error.
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<P>If the issuer includes the <B>-n</B> flag with the command, the
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following string appears at the head of the list of the tapes necessary to
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perform the restore operation:
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<PRE> Tapes needed:
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</PRE>
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<P><STRONG>Examples</STRONG>
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<P>The following command restores the volumes for which the VLDB lists a
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read/write site on the <B>/vicepd</B> partition of the machine
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<B>fs5.abc.com</B>. The Tape Coordinator associated
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with port offset 3 performs the operation.
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<PRE> % <B>backup diskrestore -server fs5.abc.com -partition /vicepd -portoffset 3</B>
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</PRE>
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<P>The following command restores the volumes for which the VLDB lists a
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read/write site on the <B>/vicepb</B> partition of the machine
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<B>fs1.abc.com</B> to a new site: the
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<B>/vicepa</B> partition on the machine
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<B>fs3.abc.com</B>. The Tape Coordinator associated
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with port offset 0 performs the operation. (The command appears here on
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two lines only for legibility.)
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<PRE> % <B>backup diskrestore -server fs1.abc.com -partition /vicepb</B> \
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<B>-newserver fs3.abc.com -newpartition /vicepa</B>
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</PRE>
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<P>The following command lists the tapes required to restore the volumes for
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which the VLDB lists a read/write site on the <B>/vicepm</B> partition of
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the machine <B>fs4.abc.com</B>:
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<PRE> % <B>backup diskrestore -server fs4.abc.com -partition /vicepm -n</B>
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Tapes needed:
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user.sunday1.1
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user.sunday1.2
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user.monday1.1
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user.tuesday1.1
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user.wednesday1.1
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</PRE>
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<P><STRONG>Privilege Required</STRONG>
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<P>The issuer must be listed in the <B>/usr/afs/etc/UserList</B> file on
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every machine where the Backup Server or Volume Location (VL) Server is
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running, and on every file server machine that houses an affected
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volume. If the <B>-localauth</B> flag is included, the issuer must
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instead be logged on to a server machine as the local superuser
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<B>root</B>.
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<P><STRONG>Related Information</STRONG>
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<P><A HREF="auarf060.htm#HDRBK_INTRO">backup</A>
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<P><A HREF="auarf073.htm#HDRBK_DUMP">backup dump</A>
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<P><A HREF="auarf091.htm#HDRBK_VOLRESTORE">backup volrestore</A>
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<P><A HREF="auarf092.htm#HDRBK_VOLSETRESTORE">backup volsetrestore</A>
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<P><A HREF="auarf126.htm#HDRBUTC">butc</A>
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<P><A HREF="auarf255.htm#HDRVOS_BACKUP">vos backup</A>
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<P><A HREF="auarf261.htm#HDRVOS_EXAMINE">vos examine</A>
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<P><A HREF="auarf266.htm#HDRVOS_LISTVOL">vos listvol</A>
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<P><A HREF="auarf270.htm#HDRVOS_RELEASE">vos release</A>
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<P>
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<HR><P ALIGN="center"> <A HREF="../index.htm"><IMG SRC="../books.gif" BORDER="0" ALT="[Return to Library]"></A> <A HREF="auarf002.htm#ToC"><IMG SRC="../toc.gif" BORDER="0" ALT="[Contents]"></A> <A HREF="auarf071.htm"><IMG SRC="../prev.gif" BORDER="0" ALT="[Previous Topic]"></A> <A HREF="#Top_Of_Page"><IMG SRC="../top.gif" BORDER="0" ALT="[Top of Topic]"></A> <A HREF="auarf073.htm"><IMG SRC="../next.gif" BORDER="0" ALT="[Next Topic]"></A> <A HREF="auarf284.htm#HDRINDEX"><IMG SRC="../index.gif" BORDER="0" ALT="[Index]"></A> <P>
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<!-- Begin Footer Records ========================================== -->
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<P><HR><B>
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<br>© <A HREF="http://www.ibm.com/">IBM Corporation 2000.</A> All Rights Reserved
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</B>
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