32v 1m restor

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RESTOR(1M) UNIX Programmer's Manual RESTOR(1M)


restor - incremental file system restore


_r_e_s_t_o_r key [ argument ... ]


_R_e_s_t_o_r is used to read magtapes dumped with the _d_u_m_p command. 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 specified 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 _m_u_s_t _b_e _d_o_n_e _b_e_f_o_r_e

    x    Each file on the tape named by an _a_r_g_u_m_e_n_t is
         extracted.  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
         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
         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
    _r_e_s_t_o_r can be done to get an incremental dump in on top of
    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.


default tape unit varies with installation rst*


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, _r_e_s_-
    _t_o_r doesn't use it.