newfs_hfs(1M)newfs_hfs(1M)NAME
newfs_hfs: newfs - construct a new HFS file system
SYNOPSIS
disk_type] swap] [mkfs-options] special
DESCRIPTION
The command builds a file system by invoking the command.
The command creates the file system with a rotational delay value of
zero (see tunefs(1M)).
special represents a character (raw) special device.
Options
recognizes the following options:
Specify the HFS file system type.
Reserve space for boot programs past the end of the file
system. If file is present on the system then
sufficient space to accommodate that file is
reserved, otherwise 691 KB sectors are reserved.
This option decreases the size of the file system
to be created. This option cannot be used if the
option is given; see below.
This option allows the
command to make the new file system in an ordi‐
nary file. In this case, special is the name of
an existing file in which to create the file sys‐
tem. The option (see "mkfs Options") must be
provided with this option.
There are two types of HFS file systems,
distinguished mainly by directory formats that
place different limits on the length of file
names.
If is specified, build a long-file-name file sys‐
tem that allows directory entries (file names) to
be up to (255) bytes long.
If is specified, build a short-file-name file
system that allows directory entries (file names)
to be up to (14) bytes long.
If neither nor is specified, build a file system
of the same type as the root file system.
Use disk parameters from the entry for the named disk type in
This option is provided for backward compatibil‐
ity with previous HP-UX releases. Any parameters
specified in the command line will override the
corresponding values in Any values not given in
the command line or in will be defaulted.
Reserve swap megabytes (MB) of swap space past the end of
the file system. This option decreases the size
of the file system to be created by the given
amount. This option cannot be used if the option
is given; see "mkfs Options" below.
Verbose; the command prints out its actions, including the
parameters passed to the command.
Echo the completed command line, but perform no other actions.
The command line is generated by incorporating
the user-specified options and other information
derived from This option allows the user to ver‐
ify the command line.
Both the and options can be given in the same command line. In this
case, both the requested swap space and the space needed for boot pro‐
grams are reserved. These options are for use when the file system
size defaults to the size of the entire disk.
mkfs Options
The mkfs-options argument can be zero or more of the following options
that can be used to override default values passed to the command:
The primary block size for files on the file system. Valid val‐
ues are:
4096, 8192, 16384, 32768, and 65536. The default
value is 8192 bytes.
The number of disk cylinders per cylinder group.
This number must be in the range 1 to 32. The
default value is 16 cylinders per group.
The fragment size for files on the file system.
fragsize represents the smallest amount of disk
space to be allocated to a file. It must be a
power of two no smaller than and no smaller than
one-eighth of the file system block size. The
default value is 1024 bytes.
The density of inodes in the file system
specified as the number of bytes per inode. The
default is 6144 bytes per inode.
This number should reflect the expected average
size of files in the file system. If fewer
inodes are desired, a larger number should be
used; if more inodes are desired, a smaller num‐
ber should be used.
The number of inodes that will be created in each
cylinder group of a file system is approximately
the size of the cylinder group divided by the
number of bytes per inode, up to a limit of 2048
inodes per cylinder group. If the size of the
cylinder group is large enough to reach this
limit, the default number of bytes per inode will
be increased.
The minimum percentage of free disk space allowed.
The default value is 10 percent.
Once the file system capacity reaches this
threshold, only users with appropriate privileges
can allocate disk blocks.
The disk speed in revolutions per minute (rpm).
The default value is 3600 revolutions per minute.
The number of blocks in the file system. is defined in The
default value is the size of the entire disk or
disk section minus any swap or boot space
requested. See mkfs_hfs(1M) for limits on the
size of HFS file systems.
The number of tracks per cylinder.
The default value depends on the size of the file
system. For file systems of less than 500 MB,
the default is 7; for file systems between 500 MB
and 1 GB, the default is 12; for file systems
larger than 1 GB the default is 16.
Specify a list of comma separated
suboptions and/or keyword/attribute pairs from
the list below.
Controls the
for the file system. The default is This
means the bit is not set and files created
on the file system will be limited to less
than 2 gigabytes in size. If is speci‐
fied, the bit is set and the maximum size
for files created on the file system is
not limited to 2 gigabytes (see
mount_hfs(1M) and fsadm_hfs(1M)).
Access Control Lists
Every file with one or more optional ACL entries consumes an extra
(continuation) inode. If you anticipate significant use of ACLs on a
new file system, you can allocate more inodes by reducing the value of
the argument to the option appropriately. The small default value typ‐
ically causes allocation of many more inodes than are actually neces‐
sary, even with ACLs. To evaluate the need for extra inodes, run the
command on existing file systems. For more information on access con‐
trol lists, see acl(5).
EXAMPLES
Execute the command to create an HFS file system on a non-LVM disk and
reserve 40 megabytes of swap space.
Create an HFS file system within a logical volume, whose size is iden‐
tical to that of the logical volume. (Note the use of the character
(raw) special device.)
WARNINGS
The old option, from prior releases of newfs(1M), is no longer sup‐
ported.
newfs(1M) cannot be executed specifying creation of a file system on a
whole disk if that disk was previously used as an LVM disk. If you wish
to do this, use mediainit(1) to reinitialize the disk first.
AUTHOR
was developed by HP and the University of California, Berkeley.
FILES
Static information about the file systems.
SEE ALSObdf(1M), fsadm_hfs(1M), mkboot(1M), mkfs(1M), mkfs_hfs(1M),
mount_hfs(1M), newfs(1M), tunefs(1M), disktab(4), acl(5),
disk(7).
newfs_hfs(1M)
