df_ufs man page on SmartOS

Man page or keyword search:  
man Server   16655 pages
apropos Keyword Search (all sections)
Output format
SmartOS logo
[printable version]

DF_UFS(1M)							    DF_UFS(1M)

       df_ufs - report free disk space on ufs file systems

       df -F ufs [generic_options] [-o i] [directory | special]

       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  system'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	 information  for  all
       mounted ufs file systems.

       The following options are supported:

			  Options  supported  by  the  generic df command. See
			  df(1M) for a description of these options.

			  Specify ufs file system specific options. The avail‐
			  able option is:

			       Report the number of used and free inodes. This
			       option can not be used with generic_options.

		      list of file systems currently mounted

       df(1M),	fsck(1M),  fstyp(1M),  tunefs(1M),  mnttab(4),	attributes(5),

       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  fragment
       count  to  calculate available space, but the file system requires con‐
       tiguous 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 fragmentation.
       See fsck(1M).

				 Feb 25, 2005			    DF_UFS(1M)

List of man pages available for SmartOS

Copyright (c) for man pages and the logo by the respective OS vendor.

For those who want to learn more, the polarhome community provides shell access and support.

[legal] [privacy] [GNU] [policy] [cookies] [netiquette] [sponsors] [FAQ]
Polarhome, production since 1999.
Member of Polarhome portal.
Based on Fawad Halim's script.
Vote for polarhome
Free Shell Accounts :: the biggest list on the net