newfs(1M)                                               newfs(1M)



     NAME
          newfs - construct a new UFS file system

     SYNOPSIS
          /etc/newfs [-v] [options] device-file type

     DESCRIPTION
          newfs constructs a Berkeley 4.2 file system (UFS) on
          device-file, which is the device-file on which the new file
          system is to be created.  The argument type indicates the
          disk type; this type is used to find the appropriate disk
          name entry in /etc/disktab.  The newfs command consults the
          disk label for disk partition information and /etc/disktab
          for disk architecture information, calculates the appropri-
          ate parameters to use in calling mkfs, and then builds the
          file system by invoking mkfs.

          If the -v option is supplied, newfs prints out its actions,
          including the parameters passed to mkfs.

          newfs uses fsirand as a security precaution.

          Options that may be used to override default parameters
          passed to mkfs are:

          -s size
               Specify the size of the file system in sectors.  If
               this option is not present, the size information from
               the disk partition map will be used.  See dpme(4).

          -b block-size
               Specify the block size of the file system in bytes.
               The default value is 4096.

          -f frag-size
               Specify the fragment size of the file system in bytes.
               The default value is 1024.

          -t tracks-per-cylinder
               Specify the number of tracks per cylinder, which is
               equivalent to the number of heads on the disk drive.
               If this option is not present, the information from
               /etc/disktab is used.

          -c cylinders-per-group
               Specify the number of cylinders per cylinder group in a
               file system.  The default value is 16.

          -m free-space
               Specify the percentage of space reserved from use by
               normal users.   This value is known as the free-space
               threshold for the file system.  The default value is



     April, 1990                                                     1

     newfs(1M)                                               newfs(1M)



               10%.  This value can be changed later using tunefs(1M).

          -r revolutions-per-minute
               Specify the speed of the disk in revolutions per minute
               (usually 3600).

          -i number of bytes per inode
               Specify the density of inodes in the file system.  The
               default is to create an inode for each 2048 bytes of
               data space.  If few inodes are desired, a larger
               bytes-per-inode should be specified.  If many inodes
               are desired, a smaller bytes-per-inode should be speci-
               fied.

     FILES
          /etc/newfs
          /etc/fs/ufs/mkfs    Actually builds the file system.
     SEE ALSO
          dp(1M), fsck(1M), fsirand(1M), tunefs(1M), dpme(4), disk-
          tab(4), ufs(4), gd(7).



































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