df_hfs(1M) df_hfs(1M)
NAME [Toc] [Back]
df_hfs: df - report number of free CDFS, HFS, or NFS file system disk
blocks
SYNOPSIS [Toc] [Back]
/usr/bin/df [-F FStype] [-befgiklntv] [-B] [-o specific_options] [-V]
[special|directory]...
DESCRIPTION [Toc] [Back]
The df command displays the number of free 512-byte blocks and free
inodes available for file systems by examining the counts kept in the
superblock or superblocks. If a special or a directory is not
specified, the free space on all mounted file systems is displayed.
If the arguments to df are path names, df reports on the file systems
containing the named files. If the argument to df is a special of an
unmounted file system, the free space in the unmounted file system is
displayed.
Options [Toc] [Back]
df recognizes the following options:
-b Report only the number of kilobytes (KB) free.
-B Report the total number of blocks allocated for
swapping to the file system as well as the number
of blocks free for swapping to the file system.
This option is supported on HFS file systems only.
-e Report the number of files free.
-f Report only the actual count of the blocks in the
free list (free inodes are not reported). When
this option is specified, df reports on raw
devices.
-F FStype Report only on the FStype file system type (see
fstyp(1M)). For the purposes of this manual
entry, FStype can be one of cdfs, hfs, and nfs,
for the CDFS, HFS, and NFS file systems,
respectively.
-g Report the entire structure described in
statvfs(2).
-i Report the total number of inodes, the number of
free inodes, number of used inodes, and the
percentage of inodes in use.
-k Report the allocation in kilobytes (KB).
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df_hfs(1M) df_hfs(1M)
-l Report on local file systems only.
-n Report the file system name. If used with no
other options, display a list of mounted file
system types.
-o specific_options
Specify options specific to the HFS file system
type. specific_options is a comma-separated list
of suboptions.
The available suboption is:
i Report the number of used and free
inodes.
-t Report the total allocated block figures and the
number of free blocks.
-v Report the percentage of blocks used, the number
of blocks used, and the number of blocks free.
This option cannot be used with other options.
-V Echo the completed command line, but perform no
other action. The command line is generated by
incorporating the user-specified options and other
information derived from /etc/fstab. This option
allows the user to verify the command line.
When df is used on an HFS file system, the file space reported is the
space available to the ordinary user, and does not include the
reserved file space specified by fs_minfree.
Unreported reserved blocks are available only to users who have
appropriate privileges. See tunefs(1M) for information about
fs_minfree.
When df is used on NFS file systems, the number of inodes is displayed
as -1 . This is due to superuser access restrictions over NFS.
EXAMPLES [Toc] [Back]
Report the number of free disk blocks for all mounted file systems:
df
Report the number of free disk blocks for all mounted HFS file
systems:
df -F hfs
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df_hfs(1M) df_hfs(1M)
Report the number of free files for all mounted NFS file systems:
df -F nfs -e
Report the total allocated block figures and the number of free
blocks, for all mounted file systems:
df -t
Report the total allocated block figures and the number of free
blocks, for the file system mounted as /usr:
df -t /usr
WARNINGS [Toc] [Back]
df does not account for:
+ Disk space reserved for swap space,
+ Space used for the HFS boot block (8K bytes, 1 per file
system),
+ HFS superblocks (8K bytes each, 1 per disk cylinder),
+ HFS cylinder group blocks (1K-8K bytes each, 1 per cylinder
group),
+ Inodes (currently 128 bytes reserved for each inode).
Non-HFS file systems may have other items that this command does not
account for.
The -b option, from prior releases, has been replaced by the -B
option.
FILES [Toc] [Back]
/dev/dsk/* File system devices.
/etc/fstab Static information about the file systems
/etc/mnttab Mounted file system table
SEE ALSO [Toc] [Back]
du(1), df(1M), fsck(1M), fstab(4), fstyp(1M), statvfs(2), mnttab(4).
STANDARDS CONFORMANCE [Toc] [Back]
df: SVID2, XPG2, XPG3
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