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df_ufs(1m) [opensolaris man page]

df_ufs(1M)						  System Administration Commands						df_ufs(1M)

df_ufs - report free disk space on ufs file systems SYNOPSIS
df -F ufs [generic_options] [-o i] [directory | special] DESCRIPTION
df displays the amount of disk space occupied by ufs file systems, the amount of used and available space, and how much of the file sys- tem's total capacity has been used.The amount of space reported as used and available is less than the amount of space in the file system; this is because the system reserves a fraction of the space in the file system to allow its file system allocation routines to work well. The amount reserved is typically about 10%; this can be adjusted using tunefs(1M). When all the space on the file system except for this reserve is in use, only the superuser can allocate new files and data blocks to existing files. When the file system is overallocated in this way, df might report that the file system is more than 100% utilized.If neither directory nor special is specified, df displays infor- mation for all mounted ufs file systems. OPTIONS
The following options are supported: generic_options Options supported by the generic df command. See df(1M) for a description of these options. -o Specify ufs file system specific options. The available option is: i Report the number of used and free inodes. This option can not be used with generic_options. FILES
/etc/mnttab list of file systems currently mounted ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu, SUNWxcu4 | +-----------------------------+-----------------------------+ SEE ALSO
df(1M), fsck(1M), fstyp(1M), tunefs(1M), mnttab(4), attributes(5), ufs(7FS), NOTES
df calculates its results differently for mounted and unmounted file systems. For unmounted systems, the numbers reflect the 10% reserva- tion. This reservation is not reflected in df output for mounted file systems. For this reason, the available space reported by the generic command can differ from the available space reported by this module. df might report remaining capacity even though syslog warns filesystem full. This issue can occur because df only uses the available frag- ment count to calculate available space, but the file system requires contiguous sets of fragments for most allocations. If you suspect that you have exhausted contiguous fragments on your file system, you can use the fstyp(1M) utility with the -v option. In the fstyp output, look at the nbfree (number of blocks free) and nffree (number of fragments free) fields. On unmounted filesystems, you can use fsck(1M) and observe the last line of output, which reports, among other items, the number of fragments and the degree of fragmen- tation. See fsck(1M). SunOS 5.11 25 Feb 2005 df_ufs(1M)

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df_hfs(1M)																df_hfs(1M)

df_hfs: df - report number of free CDFS, HFS, or NFS file system disk blocks SYNOPSIS
FStype] specific_options] [special|directory]... DESCRIPTION
The 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 are path names, reports on the file systems containing the named files. If the argument to is a special of an unmounted file system, the free space in the unmounted file system is displayed. Options recognizes the following options: Report only the number of kilobytes (KB) free. 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. Report the number of files free. Report only the actual count of the blocks in the free list (free inodes are not reported). When this option is specified, reports on raw devices. Report only on the FStype file system type (see fstyp(1M)). For the purposes of this manual entry, FStype can be one of and for the CDFS, HFS, and NFS file systems, respectively. Report the entire structure described in statvfs(2). Report the total number of inodes, the number of free inodes, number of used inodes, and the percentage of inodes in use. Report the allocation in kilobytes (KB). Report on local file systems only. Report the file system name. If used with no other options, display a list of mounted file system types. Specify options specific to the HFS file system type. specific_options is a comma-separated list of suboptions. The available suboption is: Report the number of used and free inodes. Report the total allocated block figures and the number of free blocks. 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. 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 This option allows the user to verify the command line. When 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 Unreported reserved blocks are available only to users who have appropriate privileges. See tunefs(1M) for information about When is used on NFS file systems, the number of inodes is displayed as -1 . This is due to superuser access restrictions over NFS. EXAMPLES
Report the number of free disk blocks for all mounted file systems: Report the number of free disk blocks for all mounted HFS file systems: Report the number of free files for all mounted NFS file systems: Report the total allocated block figures and the number of free blocks, for all mounted file systems: Report the total allocated block figures and the number of free blocks, for the file system mounted as /usr: WARNINGS
does not account for: o Disk space reserved for swap space, o Space used for the HFS boot block (8K bytes, 1 per file system), o HFS superblocks (8K bytes each, 1 per disk cylinder), o HFS cylinder group blocks (1K-8K bytes each, 1 per cylinder group), o Inodes (currently 128 bytes reserved for each inode). Non-HFS file systems may have other items that this command does not account for. The option, from prior releases, has been replaced by the option. FILES
File system devices. Static information about the file systems Mounted file system table SEE ALSO
du(1), df(1M), fsck(1M), fstab(4), fstyp(1M), statvfs(2), mnttab(4). STANDARDS CONFORMANCE