RESTOR(8)           UNIX Programmer's Manual            RESTOR(8)

NAME
     restor, 512restor - incremental file system restore

SYNOPSIS
     _r_e_s_t_o_r key [ argument ... ]
     _5_1_2_r_e_s_t_o_r key [ argument ... ]

DESCRIPTION
     _R_e_s_t_o_r is used to read magtapes dumped with the _d_u_m_p com-
     mand.  The _k_e_y specifies what is to be done.  _K_e_y is one of
     the characters rRxt optionally combined with f.

     f    Use the first _a_r_g_u_m_e_n_t 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 _a_r_g_u_m_e_n_t. This should not be done lightly (see
          below).  If the key is R _r_e_s_t_o_r asks which tape of a
          multi volume set to start on.  This allows restor to be
          interrupted and then restarted (an _i_c_h_e_c_k -s must be
          done before restarting ).

     x    Each file on the tape named by an _a_r_g_u_m_e_n_t 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 _r_e_s_t_o_r (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 _r_e_s_t_o_r command.

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

          It then asks you to `mount the desired tape volume'.
          Type the number of the volume you choose.  On a mul-
          tivolume dump the recommended procedure is to mount the
          last through the first volume in that order.  _R_e_s_t_o_r
          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 _r_e_s_t_o_r will read the tapes in sequential
          order.

          If you have a hierarchy to restore you can use

Printed 8/2/83                                                  1

RESTOR(8)           UNIX Programmer's Manual            RESTOR(8)

          _d_u_m_p_d_i_r(8) 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
          file system 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/hp0a 4807
          restor r /dev/hp0a

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

     A _d_u_m_p followed by a _m_k_f_s and a _r_e_s_t_o_r is used to change the
     size of a file system.

     _5_1_2_r_e_s_t_o_r is a version of _r_e_s_t_o_r that can restore tapes
     written from 512-byte block file systems.

FILES
     /dev/rmt1           default file name
     rst*                temporary files

SEE ALSO
     dump(8), dumpdir(8), mkfs(8)

DIAGNOSTICS
     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 newline when the next tape
     has been mounted.

BUGS
     There is redundant information on the tape that could be
     used in case of tape reading problems.  Unfortunately, _r_e_s_-
     _t_o_r and _5_1_2_r_e_s_t_o_r don't use it.

Printed 8/2/83                                                  2