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Annotation of coherent/a/usr/man/COHERENT/unmkfs, revision 1.1

1.1     ! root        1: 
        !             2: 
        !             3: unmkfs                       Command                       unmkfs
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        !             8: Create a prototype file system
        !             9: 
        !            10: uunnmmkkffss [-_p_r_e_f_i_x] _d_i_r_e_c_t_o_r_y _n_b_l_o_c_k_s [_f_i_l_e]
        !            11: 
        !            12: unmkfs scans directory  and builds prototype files with which you
        !            13: can build file systems on backup disks.
        !            14: 
        !            15: If prefix is given, it creates files _p_r_e_f_i_x.pp0011, _p_r_e_f_i_x.pp0022, etc.
        !            16: If it is not given, unmkfs writes its output to the standard-out-
        !            17: put device.
        !            18: 
        !            19: nblocks  gives the  maximum size of  a prototype  file.  COHERENT
        !            20: current defines  a block  as being  512 bytes (half  a kilobyte);
        !            21: thus, to make the maximum  size of a prototype file 10 kilobytes,
        !            22: set nblocks to 20.
        !            23: 
        !            24: The file  option tells unmkfs to suppress  all files in directory
        !            25: that are older than file.  If  it is not used, then unmkfs builds
        !            26: prototypes for all files in directory.
        !            27: 
        !            28: unmkfs provides a useful way  to back up file systems onto floppy
        !            29: disks.  To do this, perform the following steps:
        !            30: 
        !            31: 11. unmkfs a directory, producing prototype files.
        !            32: 
        !            33: 22. Format one floppy disk for each prototype file.
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        !            35: 33. Using the prototype files in sucession, mkfs each floppy disk.
        !            36:    This  puts the  indicated files  onto floppy  disk, preserving
        !            37:    links.
        !            38: 
        !            39: Later, you  can use  the command cpdir  to restore all  the files
        !            40: from the  floppy disks, or  you can use cp  to restore individual
        !            41: files.
        !            42: 
        !            43: ***** See Also *****
        !            44: 
        !            45: commands, mkfs
        !            46: 
        !            47: ***** Notes *****
        !            48: 
        !            49: unmkfs builds a file system in  memory as it does its work.  With
        !            50: large directory structures, it can run out of memory.
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        !            64: COHERENT Lexicon                                           Page 1
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