HP-UX Reference (11i v1 00/12) - 1M System Administration Commands N-Z (vol 4)

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STANDARD Printed by: Nora Chuang [nchuang] STANDARD
/build/1111/BRICK/man1m/naaagt.1m
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n
newfs_hfs(1M) newfs_hfs(1M)
to 32. The default value is 16 cylinders per group.
-f fragsize 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
DEV_BSIZE and no smaller than one-eighth of the file system block size. The default
value is 1024 bytes.
-i number_of_bytes_per_inode
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 number should be used.
Note: The number of inodes that will be created in each cylinder group of a file sys-
tem 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.
-m free_space_percent
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.
-r revolutions_per_minute
The disk speed in revolutions per minute (rpm). The default value is 3600 revolutions
per minute.
-s size The number of DEV_BSIZE blocks in the file system. DEV_BSIZE is defined in
<sys/param.h> . 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.
-t tracks_per_cylinder
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.
-o specific_options
Specify a list of comma separated suboptions and/or keyword/attribute pairs from the
list below.
largefiles |nolargefiles
Controls the largefile featurebit for the file system. The default is nolarge-
files
. 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 largefiles is specified, 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 -i option appropriately. The small default value typically causes allocation of many more
inodes than are actually necessary, even with ACLs. To evaluate the need for extra inodes, run the
bdf -i command on existing file systems. For more information on access control lists, see acl(5).
EXAMPLES
Execute the newfs command to create an HFS file system on a non-LVM disk /dev/rdsk/c1t0d2
and
reserve 40 megabytes of swap space.
newfs -F hfs -R 40 /dev/rdsk/c1t0d2
Create an HFS file system within a logical volume, my_lvol, whose size is identical to that of the logical
volume. (Note the use of the character (raw) special device.)
Section 1M568 2 HP-UX Release 11i: December 2000
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