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MKFS(1)                     General Commands Manual                    MKFS(1)

NAME
       mkfs - make a file system

SYNOPSIS
       mkfs [-Ldot] [-B blocksize] [-i inodes] [-b blocks] special prototype

OPTIONS
       -L     Make a listing on standard output

       -d     Use mod time of mkfs binary for all files

       -o     Use a drive other than 0 or 1 (safety precaution)

       -t     Do not test if file system fits on the medium

       -1     Make a version 1 file system (for backward compatibility)

       -i     Number of i-nodes (files)

       -B     Filesystem block size (in bytes)

       -b     Filesystem size (in blocks)

EXAMPLES
       mkfs /dev/fd1 proto # Make a file system on /dev/fd1

       mkfs -b 360 /dev/fd1
                           # Make empty 360 block file system

       mkfs /dev/fd1 360   # Alternate way to specify the size

DESCRIPTION
       Mkfs  builds  a  file  system  and  copies  specified files to it.  The
       prototype file tells which directories and files to copy to it.  If the
       prototype  file  cannot  be  opened,  and  its name is just a string of
       digits, an empty file system will be made with the specified number  of
       blocks.   A  sample  prototype  file follows.  The text following the #
       sign in the  example  below  is  comment.   In  real  prototype  files,
       comments are not allowed.

         boot                        # boot block file (ignored)
         360 63                           # blocks and i-nodes
         d--755 1 1                       # root directory
            bin   d--755 2 1         # bin dir: mode (755), uid (2), gid (1)
              sh  ---755 2 1 /user/bin/shell   # shell has mode rwxr-xr-x
              mv  -u-755 2 1 /user/bin/mv # u = SETUID bit
              login                  -ug755 2 1 /user/bin/login# SETUID and SETGID
            $                        # end of /bin
            dev   d--755 2 1         # special files: tty (char), fd0 (block)
              tty c--777 2 1 4 0     # uid=2, gid=1, major=4, minor=0
              fd0 b--644 2 1 2 0 360 # uid, gid, major, minor, blocks
            $                        # end of /dev
            user  d--755 12 1        # user dir: mode (755), uid (12), gid (1)
              ast d--755 12 1        # /user/ast
              $                      # /user/ast is empty
            $                        # end of /user
         $                           # end of root directory

       The first entry on each line (except the first 3 and the $ lines, which
       terminate directories) is the name the file or directory  will  get  on
       the  new  file  system.   Next comes its mode, with the first character
       being -dbc for regular files,  directories,  block  special  files  and
       character  special  files,  respectively.   The next two characters are
       used to specify the SETUID and SETGID bits, as shown above.   The  last
       three characters of the mode are the rwx protection bits.

       Following  the  mode are the uid and gid.  For special files, the major
       and minor devices are needed.

       The maximum size of a file system is 1 Gb for a version 2 file  system,
       and  64 Mb for a version 1 file system.  Alas the 8086 fsck runs out of
       memory on a V2 file system larger than 128 Mb, so for the 8086  version
       of MINIX 3 you have to limit yourself to file systems of that size.

SEE ALSO
       mkproto(1), fsck(1), mount(1).

                                                                       MKFS(1)
NAME | SYNOPSIS | OPTIONS | EXAMPLES | DESCRIPTION | SEE ALSO