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Annotation of coherent/a/usr/man/COHERENT/unmkfs, revision 1.1.1.1

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                      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]
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                     12: unmkfs scans directory  and builds prototype files with which you
                     13: can build file systems on backup disks.
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                     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.
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                     28: unmkfs provides a useful way  to back up file systems onto floppy
                     29: disks.  To do this, perform the following steps:
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                     31: 11. unmkfs a directory, producing prototype files.
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                     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
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                     47: ***** Notes *****
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                     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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