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-.TH "AMRESTORE" 8 "" "" ""
-.SH NAME
-amrestore \- extract backup images from an AMANDA tape
-.SH "SYNOPSIS"
+'\" t
+.\" Title: amrestore
+.\" Author: James da Silva <jds@amanda.org>
+.\" Generator: DocBook XSL Stylesheets vsnapshot_8273 <http://docbook.sf.net/>
+.\" Date: 10/18/2010
+.\" Manual: System Administration Commands
+.\" Source: Amanda 3.2.0
+.\" Language: English
+.\"
+.TH "AMRESTORE" "8" "10/18/2010" "Amanda 3\&.2\&.0" "System Administration Commands"
+.\" -----------------------------------------------------------------
+.\" * set default formatting
+.\" -----------------------------------------------------------------
+.\" disable hyphenation
+.nh
+.\" disable justification (adjust text to left margin only)
.ad l
-.hy 0
-.HP 10
-\fBamrestore\fR [\fB\-r\fR | \fB\-c\fR | \fB\-C\fR] [\-b\ \fIblocksize\fR] [\-f\ \fIfileno\fR] [\-l\ \fIlabel\fR] [\-p] [\-h] \fB\fItapedevice\fR\fR | \fB\fIholdingfile\fR\fR | \fB\fIhostname\fR\ [\fIdiskname\fR\ [\fIdatestamp\fR\ [\fIhostname\fR\ [\fIdiskname\fR\ [\fIdatestamp\fR...]]]]]\fR
-.ad
-.hy
-
-.SH "DESCRIPTION"
-
-.PP
-\fBAmrestore\fR extracts backup images from the tape mounted on \fBtapedevice\fR or from the holding disk file \fBholdingfile\fR that match \fBhostname\fR, \fBdiskname\fR and \fBdatestamp\fR patterns given on the command line\&. The tape or holding file must be in a format written by the \fBamdump\fR or \fBamflush\fR program\&.
-
+.\" -----------------------------------------------------------------
+.\" * MAIN CONTENT STARTS HERE *
+.\" -----------------------------------------------------------------
+.SH "NAME"
+amrestore \- low\-level data\-extraction from Amanda volumes
+.SH "SYNOPSIS"
+.HP \w'\fBamrestore\fR\ 'u
+\fBamrestore\fR [\-\-config\ \fIconfig\fR] [\-r | \-c | \-C] [\-b\ \fIblocksize\fR] [\-f\ \fIfilenum\fR] [\-l\ \fIlabel\fR] [\-p] [\-h] [\fB\-o\fR\ \fIconfigoption\fR...] [{\fIchangerspec\fR} | {[\-\-holding]\ \fIholdingfile\fR}] [\fIhostname\fR\ [\ \fIdiskname\fR\ [\ \fIdatestamp\fR\ [\ \fIhostname\fR\ [\ \fIdiskname\fR\ [\ \fIdatestamp\fR\ \&.\&.\&.\ ]\ ]\ ]\ ]\ ]]
.PP
-If \fBdiskname\fR is not specified, all backups on the tape for the previous \fBhostname\fR are candidates\&. If \fBdatestamp\fR is not specified, all backups on the tape for the previous \fBhostname\fR and \fBdiskname\fR are candidates\&. If no \fBhostname\fR, \fBdiskname\fR or \fBdatestamp\fR are specified, every backup on the tape is a candidate\&.
-
+Note that this is the only Amanda command which does not take a configuration name as its first argument\&.
+.SH "DESCRIPTION"
.PP
-\fBHostname\fR and \fBdiskname\fR are special expressions described in the "HOST & DISK EXPRESSION" section of \fBamanda\fR(8)\&. \fBDatestamp\fR are special expression described in the "DATESTAMP EXPRESSION" section of \fBamanda\fR(8)\&. For example, if \fBdiskname\fR is "rz[23]a", it would match disks \fBrz2a\fR and \fBrz3a\fR\&.
-
+\fIAmrestore\fR
+is a very low\-level tool for extracting data from Amanda volumes\&. It does not consult any catalog information or other metadata, basing its operations only on the headers found on the volume\&. This makes it an appropriate tool for bare\-metal restores of an Amanda server, or other situations where the catalog is not available\&.
+.PP
+See
+\fBamfetchdump\fR(8)
+and
+\fBamrecover\fR(8)
+for higher\-level recoveries\&.
+.PP
+The tool does not reassemble split dumps, but can uncompress compressed dumps\&. Note that decompression may fail for split parts after the first\&. If this occurs, extract the parts without decompressing, concatenate them, and decompress the result\&.
+.PP
+Data is restored from the current volume in
+\fIchangerspec\fR, or from the holding file
+\fIholdingfile\fR\&. In most cases,
+\fIchangerspec\fR
+will name a particular device, e\&.g\&.,
+tape:/dev/nst0
+or
+s3:mybucket/tape\-1\&.
+.PP
+Only dumps matching the dump specification beginning with
+\fIhostname\fR
+are extracted\&. If no specification is given, every file on the volume (or the entire holdingfile) is restored\&. See the "DUMP SPECIFICATIONS" section of
+\fBamanda-match\fR(7)
+for more information\&.
+.PP
+Unless
+\fB\-p\fR
+is used, candidate backup images are extracted to files in the current directory named:
+hostname\&.diskname\&.datestamp\&.dumplevel
+.SH "OPTIONS"
.PP
-\fBDatestamp\fR is useful if \fBamflush\fR writes multiple backup runs to a single tape\&.
-
+\fB\-b \fR\fB\fIblocksize\fR\fR
+.RS 4
+Use the given blocksize to read the volume\&. The default is defined by the device\&.
+.RE
.PP
-Unless \fB\-p\fR is used, candidate backup images are extracted to files in the current directory named:
-
+\fB\-f \fR\fB\fIfilenum\fR\fR
+.RS 4
+Seek to file
+\fIfilenum\fR
+before beginning the restore operation\&.
+.RE
.PP
-\fBhostname\&.diskname\&.datestamp\&.dumplevel\fR
-
+\fB\-l \fR\fB\fIlabel\fR\fR
+.RS 4
+Check that the volume has label
+\fIlabel\fR\&.
+.RE
.PP
-Amrestore doesn't use a changer, it restore from the tape already loaded in the \fBtapedevice\&.\fR
-
-.SH "OPTIONS"
-
-.TP
-\fB\-b\fR
-Set the blocksize used to read the tape or holding file\&. All holding files must be read with a blocksize of 32 KBytes\&. \fBAmrestore\fR should normally be able to determine the blocksize for tapes on its own and not need this parameter\&.
-
-.PP
-The default is 32 KBytes\&.
-
-.TP
-\fB\-f\fR
-Do a rewind followed by a fsf <fileno> before trying to restore an image\&.
-
-.TP
-\fB\-l\fR
-Check if we restoring from the tape with the right \fBlabel\fR
-
-.TP
\fB\-p\fR
-Pipe output\&. The first matching backup image is sent to standard output, which is normally a pipe to \fBrestore\fR or \fBtar\fR, then \fBamrestore\fR quits\&. It may be run again to continue selecting backups to process\&. Make sure you specify the no\-rewind \fBtapedevice\fR when doing this\&.
-
-.PP
-Note: \fBrestore\fR may report "short read" errors when reading from a pipe\&. Most versions of \fBrestore\fR support a blocking factor option to let you set the read block size, and you should set it to 2\&. See the example below\&.
-
-.TP
-\fB\-c\fR
-Compress output using the fastest method the compression program provides\&. \fBAmrestore\fR normally writes output files in a format understood by \fBrestore\fR or \fBtar\fR, even if the backups on the tape are compressed\&. With the \fB\-c\fR or \fB\-C\fR option, \fBamrestore\fR writes all files in compressed format, even if the backups on the tape are not compressed\&. Output file names will have a \&.Z or \&.gz extension depending on whether \fBcompress\fR or \fBgzip\fR is the preferred compression program\&. This option is useful when the current directory disk is small\&.
-
-.TP
-\fB\-C\fR
-Compress output using the best method the compression program provides (may be very CPU intensive)\&. See the notes above about the \fB\-c\fR option\&.
-
-.TP
-\fB\-r\fR
-Raw output\&. Backup images are output exactly as they are on the tape, including the \fBamdump\fR headers\&. Output file names will have a \&.RAW extension\&. This option is only useful for debugging and other strange circumstances\&.
-
-.TP
+.RS 4
+Pipe the first matching file to standard output\&. This is typically used in a shell pipeline to send the data to a process like
+\fBtar\fR
+for extraction\&.
+.RE
+.PP
+\fB\-c\fR, \fB\-C\fR
+.RS 4
+If the file is not already compressed, compress it using the fastest (\fB\-c\fR) or best (\fB\-C\fR) compression algorithm\&. Note that
+\fBamrestore\fR
+will not re\-compress an already\-compressed file\&. Without either of these options,
+\fBamrestore\fR
+will automatically uncompress any compressed files\&. This option is useful when the destination disk is small\&.
+.RE
+.PP
\fB\-h\fR
-Header output\&. The tape header block is output at the beginning of each file\&. This is like \fB\-r\fR except \fB\-c\fR or \fB\-C\fR may also be used to compress the result\&. \fBAmrecover\fR uses the header to determine the restore program to use\&.
-
+.RS 4
+Include 32k headers on all output files, similar to a holding file\&. This header can be read by another application or utility (see
+\fBAmanda::Header\fR) during the next phase of processing\&.
+.RE
.PP
-If a header is written (\-r or \-h), only 32 KBytes are output regardless of the tape blocksize\&. This makes the resulting image usable as a holding file\&.
-
+\fB\-r\fR
+.RS 4
+Output raw files\&. This is similar to
+\fB\-h\fR, but also disables any automatic decompression\&. Output file names will have a
+\&.RAW
+extension\&.
+.RE
+.PP
+\fB\-o \fR\fB\fIconfigoption\fR\fR
+.RS 4
+See the "CONFIGURATION OVERRIDE" section in
+\fBamanda\fR(8)\&.
+.RE
.SH "EXAMPLES"
-
.PP
-The following does an interactive restore of disk \fBrz3g\fR from host \fBseine\fR, to restore particular files\&. Note the use of the \fBb\fR option to \fBrestore\fR, which causes it to read in units of two 512\-byte blocks (1 Kbyte) at a time\&. This helps keep it from complaining about short reads\&.
-
+The following does an interactive restore of disk
+\fIrz3g\fR
+from host
+\fIseine\fR, to restore particular files\&. Note the use of the
+\fIb\fR
+option to
+\fIrestore\fR, which causes it to read in units of two 512\-byte blocks (1 Kbyte) at a time\&. This helps keep it from complaining about short reads\&.
.nf
-
-% amrestore \-p /dev/nrmt9 seine rz3g | restore \-ivbf 2 \-
-
+ amrestore \-p /dev/nrmt9 seine rz3g | tar \-xv
.fi
-
.PP
-The next example extracts all backup images for host \fBseine\fR\&. This is the usual way to extract all data for a host after a disk crash\&.
-
+The next example extracts all backup images for host
+\fIseine\fR\&. This is a typical way to extract all data for a host after a disk crash\&.
.nf
-
-% amrestore /dev/nrmt9 seine
-
+ amrestore /dev/nrmt9 seine
.fi
-
.PP
-If the backup datestamp in the above example is 19910125 and \fBseine\fR has level 0 backups of disks \fBrz1a\fR and \fBrz1g\fR on the tape, these files will be created in the current directory:
-
+If the backup datestamp in the above example is
+20070125
+and
+\fIseine\fR
+has level 0 backups of disks
+\fIrz1a\fR
+and
+\fIrz1g\fR
+on the tape, these files will be created in the current directory:
.nf
-
-seine\&.rz1a\&.19910125\&.0
-seine\&.rz1g\&.19910125\&.0
-
+ seine\&.rz1a\&.19910125\&.0
+ seine\&.rz1g\&.19910125\&.0
.fi
-
.PP
-You may also use \fBamrestore\fR to extract a backup image from a holding disk file that has not yet been flushed to tape:
-
+You may also use
+\fBamrestore\fR
+to extract a backup image from a holding disk file that has not yet been flushed to tape:
.nf
-
-% amrestore \-p /amanda/20001119/seine\&.rz1a\&.2 | restore \-ivbf 2 \-
-
+ amrestore \-p /amanda/20001119/seine\&.rz1a\&.2 | tar \-xv
.fi
-
+.SH "CAVEATS"
.PP
-\fBAmrestore\fR may be used to generate a listing of images on a tape:
-
-.nf
-
-% mt \-f /dev/nrmt9 rewind
-% amrestore \-p /dev/nrmt9 no\-such\-host > /dev/null
-
-.fi
-
+\fBGNU\-tar\fR
+must be used to restore files from backup images created with the GNUTAR dumptype\&. Vendor tar programs sometimes fail to read GNU Tar images\&.
+.SH "SEE ALSO"
.PP
-This asks \fBamrestore\fR to find images for host \fBno\-such\-host\fR\&. It will not find any entries that match, but along the way will report each image it skips\&.
-
-.SH "CAVEATS"
-
+\fBamanda\fR(8),
+\fBamanda-match\fR(7),
+\fBamfetchdump\fR(8),
+\fBamrecover\fR(8)
.PP
-\fBGNU\-tar\fR must be used to restore files from backup images created with the GNUTAR dumptype\&. Vendor tar programs sometimes fail to read GNU tar images\&.
-
-.SH "AUTHOR"
-
+The Amanda Wiki:
+: http://wiki.zmanda.com/
+.SH "AUTHORS"
.PP
-James da Silva, <jds@amanda\&.org>, University of Maryland, College Park: Original text
-
+\fBJames da Silva\fR <\&jds@amanda\&.org\&>
.PP
-Stefan G\&. Weichinger, <sgw@amanda\&.org>, maintainer of the \fBAMANDA\fR\-documentation: XML\-conversion
-
-.SH "SEE ALSO"
-
+\fBStefan G\&. Weichinger\fR <\&sgw@amanda\&.org\&>
.PP
-\fBamanda\fR(8), \fBamdump\fR(8), \fBamflush\fR(8), \fBtar\fR(1) \fBrestore\fR(8)
-
+\fBDustin J\&. Mitchell\fR <\&dustin@zmanda\&.com\&>
+.RS 4
+Zmanda, Inc\&. (http://www\&.zmanda\&.com)
+.RE
projects / debian / amanda / blobdiff