MKFS(8)                 COMMAND REFERENCE                 MKFS(8)



NAME
     mkfs - construct a file system

SYNOPSIS
     /etc/mkfs special size [ nsect ] [ ntrack ] [ blksize ] [
     fragsize ] [ ncpg ]
     [ minfree ] [ rps ] [ nbpi ]

DESCRIPTION
          NOTE:   file systems are normally created with the
                  newfs(8) command.

     Mkfs constructs a file system by writing on the special file
     special. Special must have been previously formatted with
     scsifmt(8) or its equivalent in the Stand-Alone Utilities
     Package. The numeric size specifies the number of sectors in
     the file system.  Mkfs builds a file system with a root
     directory and a lost+found directory.  (see fsck(8)) The
     number of inodes is calculated as a function of the file
     system size.  No boot program is initialized by mkfs (see
     newfs(8)).

     Mkfs must be run as super-user, since it must open special
     for reading.

OPTIONS
     The optional arguments allow fine tune control over the
     parameters of the file system.

     nsect  Specifies the number of sectors per track on the
            disk.

     ntrack Specifies the number of tracks per cylinder on the
            disk.

     blksize
            Gives the primary block size for files on the file
            system.  It must be a power of two, currently
            selected from 4096 or 8192.  The default value of
            8192 is preferred for performance reasons.

     fragsize
            Gives the fragment size for files on the file system.
            The fragsize represents the smallest amount of disk
            space that will be allocated to small files.  It must
            be a power of two currently selected from the range
            512 to 8192, and must not be less than one eighth of
            blksize. The default value of 1024 is preferred.

     ncpg   Specifies the number of disk cylinders per cylinder
            group.  This number must be in the range 1 to 32.
            The default value is 20.



Printed 4/6/89                                                  1

MKFS(8)                 COMMAND REFERENCE                 MKFS(8)



     minfree
            Specifies the minimum percentage of free disk space
            allowed.  Once the file system capacity reaches this
            threshold, only the super-user is allowed to allocate
            disk blocks.  The default value is 10%.

     rps    If a disk does not revolve at 60 revolutions per
            second (3600 RPM), this parameter should give the
            rotational speed in revolutions per second.

     nbpi   The number of file system bytes per inode.  It is
            used to calculate the number of inode blocks per
            cylinder group.  The default value of 2048 means that
            there will be enough inodes in each cylinder group to
            handle an average file size of 2048 bytes.

RETURN VALUE
     [NO_ERRS]      Command completed without error.

     [USAGE]        Incorrect command line syntax. Execution
                    terminated.

     [NP_WARN]      An error warranting a warning message
                    occurred. Execution continues.

     [NP_ERR]       An error occurred that was not a system
                    error.  Execution terminated.

     [P_ERR]        A system error occurred. Execution
                    terminated.  See intro(2) for more
                    information on system errors.

SEE ALSO
     fs(5), dir(5), fsck(8), newfs(8), and tunefs(8).





















Printed 4/6/89                                                  2

%%index%%
na:240,82;
sy:322,764;
de:1086,1172;
op:2258,1614;4184,892;
rv:5076,665;
se:5741,201;
%%index%%000000000119