NAME

     newfs_hfs — construct a new HFS Plus file system

SYNOPSIS

     newfs_hfs [-N] [-U uid] [-G gid] [-M mask] [-P] [-s] [-b block-size] [-c clump-size-list]
               [-i first-cnid] [-J [journal-size]] [-n node-size-list] [-v volume-name] special
     newfs_hfs -N partition-size [-U uid] [-G gid] [-M mask] [-P] [-h | -w] [-s] [-b block-size]
               [-c clump-size-list] [-i first-cnid] [-J [journal-size]] [-n node-size-list]
               [-v volume-name]

DESCRIPTION

     Newfs_hfs builds an HFS Plus file system on the specified special device.  Before running
     newfs_hfs the disk should be partitioned using the Disk Utility application or pdisk(8).

     The file system default parameters are calculated based on the size of the disk partition.
     Typically the defaults are reasonable, however newfs_hfs has several options to allow the
     defaults to be selectively overridden.  The options are as follows:

     -N [partition-size]
                 Causes the file system parameters to be printed out without really creating the
                 file system.  If the argument following the -N starts with a decimal digit, it
                 is assumed to be a partition size.  The paritition size may be given in decimal,
                 octal (with leading `0'), or hexadecimal (with leading `0x').  The partition
                 size argument can be specified in 512-byte blocks (with a `b' suffix), petabytes
                 (`p' suffix), terabytes (`t' suffix), gigabytes (`g' suffix), megabytes (`m'
                 suffix), or kilobytes (`k' suffix).  All suffixes indicate binary, not decimal,
                 multipliers (e.g., `1k' is 1024 bytes).  If no suffix is specified, the value is
                 assumed to be in bytes; if an illegal suffix is specified, it results in a size
                 of 0 bytes.

                 If the partition size is given, then no special device argument shall be
                 provided.  If no partition size is given, then the size of the given special
                 device is used instead, and the special device will not be written to.

     -U uid      Set the owner of the file system's root directory to uid.

     -G gid      Set the group of the file system's root directory to gid.

     -M mask     Specify the octal access permissions mask for the file system's root directory.

     -P          Set kHFSContentProtectionBit in the volume's attributes, which will cause the
                 volume to be mounted with the "protect" option if the kernel supports it.

     -s          Creates a case-sensitive HFS Plus filesystem. By default a case-insensitive
                 filesystem is created.  Case-sensitive HFS Plus file systems require a Mac OS X
                 version of 10.3 (Darwin 7.0) or later.

     -b block-size
                 The allocation block size of the file system.  The default value is 4096.

     -c clump-size-list
                 This specifies the clump and/or initial sizes, in allocation blocks, for the
                 various metadata files.  Clump sizes are specified with the -c option followed
                 by a comma separated list of the form arg=blocks.

                 Example:  -c c=5000,e=500

                 a=blocks    Set the attribute file clump size.

                 b=blocks    Set the allocation bitmap file clump size.

                 c=blocks    Set the catalog file clump size.

                 d=blocks    Set the data fork clump size.

                 e=blocks    Set the extent overflow file clump size.

                 r=blocks    Set the resource fork clump size.

     -i first-cnid
                 This specifies the initial catalog node ID for user files and directories. The
                 default value is 16.

     -J [journal-size]
                 Creates a journaled HFS+ volume.  The default journal size varies, based on the
                 size of the volume.  Appending an 'M' to the journal size implies megabytes
                 (i.e. 64M is 64 megabytes).  The maximum journal size is 1024 megabytes.

     -n node-size-list
                 This specifies the b-tree node sizes, in bytes, for the various b-tree files.
                 Node sizes are specified with the -n option followed by a comma separated list
                 of the form arg=bytes. The node size must be a power of two and no larger than
                 32768 bytes.

                 Example:  -n c=8192,e=4096

                 a=bytes     Set the attribute b-tree node size.

                 c=bytes     Set the catalog b-tree node size.

                 e=bytes     Set the extent overflow b-tree node size.

     -v volume-name
                 Volume name (file system name) in ascii or UTF-8 format.

SEE ALSO

     mount(8), pdisk(8)

HISTORY

     The newfs_hfs command appeared in Mac OS X Server 1.0 .  As of Mac OS X 10.6, this utility
     no longer generates HFS standard file systems.