NEWFS(8)NEWFS(8)NAMEnewfs - construct a new file system
SYNOPSIS
/usr/etc/newfs [ -N ] [ -v ] [ -n ] [ mkfs-options ] character-device [
disk-type ]
DESCRIPTION
Newfs is a ``friendly'' front-end to the mkfs(8) program. Newfs will
look up the type of disk a file system is being created on by using the
information contained in the disk label of the character-device. If
the disk-type argument is specified the information in the disk
description file /etc/disktab is used. This disk information is used
to calculate the appropriate parameters to use in calling mkfs, then
build the file system by forking mkfs and, if the file system is a root
partition, install the necessary bootstrap programs in the initial 8
sectors of the device. The -n option prevents the bootstrap programs
from being installed. The -N option causes the file system parameters
to be printed out without actually creating the file system.
If the -v option is supplied, newfs will print out its actions,
including the parameters passed to mkfs.
Options which may be used to override default parameters passed to mkfs
are:
-s size The size of the file system in sectors.
-b block-size
The block size of the file system in bytes.
-f frag-size
The fragment size of the file system in bytes.
-t #tracks/cylinder
-c #cylinders/group
The number of cylinders per cylinder group in a file system.
The default value used is 16.
-m free space %
The percentage of space reserved from normal users; the
minimum free space threshold. The default value used is 10%.
-o optimization preference (``space'' or ``time'')
The file system can either be instructed to try to minimize
the time spent allocating blocks, or to try to minimize the
space fragmentation on the disk. If the value of minfree
(see above) is less than 10%, the default is to optimize for
space; if the value of minfree greater than or equal to 10%,
the default is to optimize for time.
-r revolutions/minute
The speed of the disk in revolutions per minute (normally
3600).
-S sector-size
The size of a sector in bytes.
-i number of bytes per inode
This specifies the density of inodes in the file system. The
default is to create an inode for each 2048 bytes of data
space. If fewer inodes are desired, a larger number should
be used; to create more inodes a smaller number should be
given.
FILES
/etc/disktab for disk geometry and file system partition information
/usr/etc/mkfs to actually build the file system
/usr/standalone/boot for boot strapping programs
SEE ALSOdisktab(5), fs(5), disk(8), diskpart(8), fsck(8), format(8), mkfs(8),
tunefs(8)
M. McKusick, W. Joy, S. Leffler, R. Fabry, ``A Fast File System for
UNIX'', ACM Transactions on Computer Systems 2, 3. pp 181-197, August
1984. (reprinted in the System Manager's Manual, SMM:14)
4.2 Berkeley Distribution May 21, 1986 NEWFS(8)