ufsrestore(1M) UNIX System V(UFS) ufsrestore(1M)
NAME
ufsrestore - incremental file system restore
SYNOPSIS
/usr/sbin/ufsrestore options [ filename... ]
DESCRIPTION
ufsrestore restores files from backup tapes created with the ufsdump.
command. options is a string of at least one of the options listed
below, along with any modifiers and arguments you supply. Remaining
arguments to ufsrestore are the names of files (or directories whose
files) are to be restored to disk. Unless the h modifier is in effect, a
directory name refers to the files it contains, and (recursively) its
subdirectories and the files they contain.
The options are:
-i Interactive. After reading in the directory information from the
tape, ufsrestore invokes an interactive interface that allows you
to browse through the dump tape's directory hierarchy and select
individual files to be extracted. See Interactive Commands,
below, for a description of available commands.
-r Restore the entire tape. Load the tape's full contents into the
current directory. This option should be used only to restore a
complete dump tape onto a clear filesystem, or to restore an
incremental dump tape after a full level 0 restore.
-R Resume restoring. ufsrestore requests a particular tape of a
multivolume set from which to resume a full restore (see the -r
option above). This allows ufsrestore to start from a checkpoint
when it is interrupted in the middle of a full restore.
-t Table of contents. List each filename that appears on the tape. If
no filename argument is given, the root directory is listed. This
results in a list of all files on the tape, unless the -h modifier
is in effect.
-x Extract the named files from the tape. If a named file matches a
directory whose contents were written onto the tape, and the -h
modifier is not in effect, the directory is recursively extracted.
The owner, modification time, and mode are restored (if possible).
If no filename argument is given, the root directory is extracted.
This results in the entire tape being extracted unless the -h
modifier is in effect.
-c Convert the contents of the dump tape to the new filesystem format.
-d Debug. Turn on debugging output.
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ufsrestore(1M) UNIX System V(UFS) ufsrestore(1M)
h Extract the actual directory, rather than the files that it
references. This prevents hierarchical restoration of complete
subtrees from the tape.
m Extract by inode numbers rather than by filename to avoid
regenerating complete pathnames. This is useful if only a few
files are being extracted.
v Verbose. ufsrestore displays the name of each file it restores,
preceded by its file type.
y Do not ask whether to abort the restore in the event of tape
errors. ufsrestore tries to skip over the bad tape block(s) and
continue as best it can.
b factor
Blocking factor. Specify the blocking factor for tape reads. By
default, ufsrestore will attempt to figure out the block size of
the tape.
Note: a tape block is 512 bytes.
f dump-file
Use dump-file instead of /dev/dump? as the file to restore from.
If dump-file is specified as `-', ufsrestore reads from the
standard input. This allows, ufsdump(1M) and ufsrestore to be
used in a pipeline to dump and restore a file system:
example# ufsdump 0f - /dev/rxy0g | (cd /mnt; ufsrestore
xf -)
If the name of the file is of the form machine:device the restore
is done from the specified machine over the network using rmt(1M).
Since ufsrestore is normally run by root, the name of the local
machine must appear in the .rhosts file of the remote machine. If
the file is specified as user!machine:device, ufsrestore will
attempt to execute as the specified user on the remote machine.
The specified user must have a .rhosts file on the remote machine
that allows root from the local machine. If ufsrestore is called
as ufsrrestore, the tape defaults to dumphost:/dev/rmt8. To
direct the input from a desired remote machine, set up an alias
for dumphost in the file /etc/hosts.
s n Skip to the n'th file when there are multiple dump files on the
same tape. For example, the command:
example# ufsrestore xfs /dev/nrar0 5
would position you at the fifth file on the tape.
ufsrestore enters interactive mode when invoked with the i option.
Interactive commands are reminiscent of the shell. For those commands
that accept an argument, the default is the current directory.
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ufsrestore(1M) UNIX System V(UFS) ufsrestore(1M)
ls[directory] List files in directory or the current directory,
represented by a `.' (period). Directories are appended
with a `/' (backslash). Entries marked for extraction are
prefixed with a `*' (asterisk). If the verbose option is
in effect, inode numbers are also listed.
cd directory Change to directory directory (within the dump-tape).
pwd Print the full pathname of the current working directory.
add[filename] Add the current directory, or the named file or directory
directory to the list of files to extract. If a directory
is specified, add that directory and its files
(recursively) to the extraction list (unless the h
modifier is in effect).
delete[filename]
Delete the current directory, or the named file or
directory from the list of files to extract. If a
directory is specified, delete that directory and all its
descendents from the extraction list (unless the h
modifier is in effect). The most expedient way to extract
a majority of files from a directory is to add that
directory to the extraction list, and then delete specific
files to omit.
extract Extract all files on the extraction list from the dump
tape. ufsrestore asks which volume the user wishes to
mount. The fastest way to extract a small number of files
is to start with the last tape volume and work toward the
first.
verbose Toggle the status of the v modifier. While v is in
effect, the ls command lists the inode numbers of all
entries, and ufsrestore displays information about each
file as it is extracted.
help Display a summary of the available commands.
quit ufsrestore exits immediately, even if the extraction list
is not empty.
NOTES
ufsrestore can get confused when doing incremental restores from dump
tapes that were made on active file systems.
A level 0 dump must be done after a full restore. Because ufsrestore
runs in user mode, it has no control over inode allocation; this means
that ufsrestore repositions the files, although it does not change their
contents. Thus, a full dump must be done to get a new set of directories
reflecting the new file positions, so that later incremental dumps will
be correct.
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ufsrestore(1M) UNIX System V(UFS) ufsrestore(1M)
DIAGNOSTICS
ufsrestore complains about bad option characters.
Read errors result in complaints. If y has been specified, or the user
responds y, ufsrestore will attempt to continue.
If the dump extends over more than one tape, ufsrestore asks the user to
change tapes. If the x or i option has been specified, ufsrestore also
asks which volume the user wishes to mount.
There are numerous consistency checks that can be listed by ufsrestore.
Most checks are self-explanatory or can never happen. Common errors are
given below.
Converting to new file system format.
A dump tape created from the old file system has been loaded. It
is automatically converted to the new file system format.
filename: not found on tape
The specified file name was listed in the tape directory, but was
not found on the tape. This is caused by tape read errors while
looking for the file, and from using a dump tape created on an
active file system.
expected next file inumber, got inumber
A file that was not listed in the directory showed up. This can
occur when using a dump tape created on an active file system.
Incremental tape too low
When doing an incremental restore, a tape that was written before
the previous incremental tape, or that has too low an incremental
level has been loaded.
Incremental tape too high
When doing incremental restore, a tape that does not begin its
coverage where the previous incremental tape left off, or one that
has too high an incremental level has been loaded.
Tape read error while restoring filename
Tape read error while skipping over inode inumber
Tape read error while trying to resynchronize
A tape read error has occurred.
If a file name is specified, then its contents are probably
partially wrong. If an inode is being skipped or the tape is
trying to resynchronize, then no extracted files have been
corrupted, though files may not be found on the tape.
resync ufsrestore, skipped num
After a tape read error, ufsrestore may have to resynchronize
itself. This message lists the number of blocks that were skipped
over.
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ufsrestore(1M) UNIX System V(UFS) ufsrestore(1M)
FILES
dumphost:/dev/rmt8
the default tape drive if called as ufsrrestore
/tmp/rstdir*
file containing directories on the tape
/tmp/rstmode*
owner, mode, and timestamps for directories
./restoresymtable
information passed between incremental restores
SEE ALSO
ufsdump(1M), mkfs(1M), mount(1M).
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