# 2.11BSD#431 - /usr/man/cat8/newfs.0

    NEWFS(8)	    UNIX Programmer's Manual		 NEWFS(8)

    NAME
         newfs - construct a new file system

    SYNOPSIS
         /sbin/newfs [ -N ] [ -m free-gap ] [ -n free-modulus ] [ -i
         bytes ] [ -s size ] [ -T disk-type ] special

    DESCRIPTION
         Newfs is a ``friendly'' front-end to the mkfs(8) program.
         Newfs(8) will normally read the disklabel from the drive to
         determine the partition sizes.  If the driver for the disk
         does not support disklabels the -T option must be used to
         force a search of /etc/disktab for partition information
         about drive-type.	Newfs calculates the appropriate parame-
         ters to use in calling mkfs, then builds the file system by
         forking mkfs.

         -N causes the mkfs command which would be executed to be
         printed out without actually creating the file system.  The
         disk specified by special must be online though so that
         newfs can read the disklabel.

         -m allows the specification of the block interleaving of the
         free list.  If not specified or outside the range 1 thru 32
         then a value of 2 is used.

         -n parameter is the freelist modulus (when the -m pattern
         repeats) and is calculated by newfs to be 1 cylinder in size
         by default.

         -i specifies how many bytes per inode to assume when calcu-
         lating how many inodes to allocate.  The default is 4096
         bytes per inode.  If this results in too few inodes being
         allocated (there is an absolute maximum of 65500) then
         decrease the bytes number (which must lie between 512 and
         65536).

         -T must be used if the disk specified by special has not
         been labeled with the disklabel(8) program.  In this case
         disk-type is used by getdisklabel(3) when searching
         /etc/disktab.  This option is used when the underlying dev-
         ice driver does not support disklabels.  Care must be taken
         that the contents of /etc/disktab match the partition tables
         in the kernel.

         -s specifies how many sectors the file system is to contain.
         There are two sectors per file system block, therefore size
         should be even.  This parameter must be less than or equal
         to the partition size (as determined from the disklabel or
         /etc/disktab).  An error is printed and no action is taken
         if the partition size is 0 or too large.

    Printed 11/24/99	 April 12, 1996                         1

    NEWFS(8)	    UNIX Programmer's Manual		 NEWFS(8)

    	  NOTE: Mkfs deals in units of filesystem blocks not sec-
    	  tors.  Newfs uses sectors.

    FILES
         /etc/disktab   disk geometry and partition information
         mkfs to actually build the file system

    SEE ALSO
         getdisklabel(3), disklabel(8), disktab(5), diskpart(8),
         fs(5), fsck(8), mkfs(8)

    BUGS
         newfs(8) no longer places boot blocks on the filesystem.
         That duty has been moved to the disklabel(8) program.  If
         you must place a boot block on a disk whose driver does not
         support disklabels use dd(1).

    Printed 11/24/99	 April 12, 1996                         2

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