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     RESTOR(1M)                                             RESTOR(1M)

          restor - incremental file system restore

          restor key [ argument ... ]

          Restor is used to read magtapes dumped with the dump com-
          mand.  The key specifies what is to be done.  Key is one of
          the characters rRxt optionally combined with f.

          f    Use the first argument as the name of the tape instead
               of the default.

          r or R
               The tape is read and loaded into the file system speci-
               fied in argument. This should not be done lightly (see
               below).  If the key is R restor asks which tape of a
               multi volume set to start on.  This allows restor to be
               interrupted and then restarted (an icheck -s must be
               done before

          x    Each file on the tape named by an argument is
               extracted.  The file name has all `mount' prefixes
               removed; for example, /usr/bin/lpr is named /bin/lpr on
               the tape.  The file extracted is placed in a file with
               a numeric name supplied by restor (actually the inode
               number).  In order to keep the amount of tape read to a
               minimum, the following procedure is recommended:

               Mount volume 1 of the set of dump tapes.

               Type the restor command.

               Restor will announce whether or not it found the files,
               give the number it will name the file, and rewind the

               It then asks you to `mount the desired tape volume'.
               Type the number of the volume you choose.  On a multi-
               volume dump the recommended procedure is to mount the
               last through the first volume in that order.  Restor
               checks to see if any of the files requested are on the
               mounted tape (or a later tape, thus the reverse order)
               and doesn't read through the tape if no files are.  If
               you are working with a single volume dump or the number
               of files being restored is large, respond to the query
               with `1' and restor will read the tapes in sequential

     RESTOR(1M)                                             RESTOR(1M)

               If you have a hierarchy to restore you can use dump-dir(1) to produce the list of names and a shell script
               to move the resulting files to their homes.

          t    Print the date the tape was written and the date the
               filesystem was dumped from.

          The r option should only be used to restore a complete dump
          tape onto a clear file system or to restore an incremental
          dump tape onto this.  Thus

               /etc/mkfs /dev/rp0 40600
               restor r /dev/rp0

          is a typical sequence to restore a complete dump.  Another
          restor can be done to get an incremental dump in on top of

          A dump followed by a mkfs and a restor is used to change the
          size of a file system.

          default tape unit varies with installation

          dump(1), mkfs(1), dumpdir(1)

          There are various diagnostics involved with reading the tape
          and writing the disk.  There are also diagnostics if the i-
          list or the free list of the file system is not large enough
          to hold the dump.

          If the dump extends over more than one tape, it may ask you
          to change tapes.  Reply with a new-line when the next tape
          has been mounted.

          There is redundant information on the tape that could be
          used in case of tape reading problems.  Unfortunately,
          restor doesn't use it.