'\" t .\" Title: amrestore .\" Author: James da Silva .\" Generator: DocBook XSL Stylesheets v1.78.1 .\" Date: 12/01/2017 .\" Manual: System Administration Commands .\" Source: Amanda 3.5.1 .\" Language: English .\" .TH "AMRESTORE" "8" "12/01/2017" "Amanda 3\&.5\&.1" "System Administration Commands" .\" ----------------------------------------------------------------- .\" * Define some portability stuff .\" ----------------------------------------------------------------- .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .\" http://bugs.debian.org/507673 .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ .ie \n(.g .ds Aq \(aq .el .ds Aq ' .\" ----------------------------------------------------------------- .\" * set default formatting .\" ----------------------------------------------------------------- .\" disable hyphenation .nh .\" disable justification (adjust text to left margin only) .ad l .\" ----------------------------------------------------------------- .\" * 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] [\-\-exact\-match] [\-\-continue\-on\-filter\-error] [\fB\-o\fR\ \fIconfigoption\fR...] [{\fIchangerspec\fR} | {[\-\-holding]\ \fIholdingfile\fR}] [\fIhostname\fR\ [\ \fIdiskname\fR\ [\ \fIdatestamp\fR\ [\ \fIhostname\fR\ [\ \fIdiskname\fR\ [\ \fIdatestamp\fR\ \&.\&.\&.\ ]\ ]\ ]\ ]\ ]] .PP Note that this is the only Amanda command which does not take a configuration name as its first argument\&. .SH "DESCRIPTION" .PP \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 \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 \fB\-f \fR\fB\fIfilenum\fR\fR .RS 4 Seek to file \fIfilenum\fR before beginning the restore operation\&. .RE .PP \fB\-l \fR\fB\fIlabel\fR\fR .RS 4 Check that the volume has label \fIlabel\fR\&. .RE .PP \fB\-p\fR .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 .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 \fB\-r\fR .RS 4 Output raw files\&. This is similar to \fB\-h\fR, but also disables any automatic decompression and/or decryption\&. Output file names will have a \&.RAW extension\&. .RE .PP \fB\-\-exact\-match\fR .RS 4 The host and disk are parsed as exact values\&. .RE .PP \fB\-\-continue\-on\-filter\-error\fR .RS 4 continue to the next dump if a filter (decompression/decryption) fail\&. .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 \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 | tar \-xv .fi .PP 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 .fi .PP 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 .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: .nf amrestore \-p /amanda/20001119/seine\&.rz1a\&.2 | tar \-xv .fi .SH "CAVEATS" .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 "SEE ALSO" .PP \fBamanda\fR(8), \fBamanda-match\fR(7), \fBamfetchdump\fR(8), \fBamrecover\fR(8) .PP The Amanda Wiki: : http://wiki.zmanda.com/ .SH "AUTHORS" .PP \fBJames da Silva\fR <\&jds@amanda\&.org\&> .PP \fBStefan G\&. Weichinger\fR <\&sgw@amanda\&.org\&> .PP \fBDustin J\&. Mitchell\fR <\&dustin@zmanda\&.com\&> .RS 4 Zmanda, Inc\&. (http://www\&.zmanda\&.com) .RE