Manual page for NEWFS(8)
newfs - 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 ALSO
disktab(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)
Created by unroff & hp-tools.
© somebody (See intro for details). All Rights Reserved.
Last modified 11/5/97
