NEWFS_HFS(8)						    BSD System Manager's Manual 					      NEWFS_HFS(8)

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' suf-
		 fix).	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 fol-
		 lowed 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.

Mac OS X							   June 19, 2008							  Mac OS X