DF(1,C) AIX Commands Reference DF(1,C)
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df
PURPOSE
Reports the number of available disk blocks.
SYNTAX
+------+ +------------------+
df ---+- -I -+---| 1|---|
|- -L -| +--- filesystem ---+
|- -M -| ^ |
|- -g -| +--------------+
|- -i -|
|- -p -|
|- -s -|
+- -v -+
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1 The default action is to provide information for each file system
on each site in the current cluster partition for which the
/etc/filesystems entry has the attribute free=true.
Warning: See restrictions, Chapter 18, AIX Programming Tools and Interfaces.
DESCRIPTION
The df command writes to standard output information about total space and
available space on the specified file systems. All space values are given in
kilobytes. If the filesystem argument is used, df reports on the specified
file system. The filesystem argument can be the name of the device on which
the file system resides or the directory on which it is mounted.
Normally, the df command uses free counts maintained in the superblock. Under
certain exceptional circumstances, these counts can be in error. If a file
system is being actively modified when df is run, the free count can be
inaccurate.
The df command fails if the file system is unmounted but attached to a site
whose CPU type has a different byte ordering than the machine on which the
command is run.
FLAGS
-g Displays the global file system number for each file system.
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-i Reports the number of free and used inodes. (If the primary site is down,
the df -i command reports the number of used inodes is 1 since, without the
primary site, this number is unknown.) The -i flag is the default for the
df command.
-I Lists file system, total kilobytes used and free, percentage used, and
"Mounted on" columns.
-L If used without a filesystem argument, df reports on all file systems
mounted on the site on which the command is run.
-M Displays "Mounted on" in the second column.
-p Lists the pack number with each file system.
-s Checks for count errors by forcing df to fully search the free lists of the
local file systems to verify the counts. The df command requires
considerably more processing time when the -s flag is specified. Using the
-s flag automatically invokes the -L flag so that df reports on file systems
for the site processing the df command.
-v Lists all fields (verbose output).
EXAMPLES
1. To list information about all default file systems on all sites:
df
If the cluster contained two sites (atlas and procyon), each with a mounted
/tmp directory in addition to the root and local, the output from the df
command looks similar to this:
Filesystem Total KB free %used iused %iused Mounted on
/dev/hd02 25692 2812 89% 6053 61% /
/dev/hd03 11220 1628 85% 669 33% /atlas
/dev/hd04 22912 5396 76% 2335 56% /atlas/tmp
/dev/hd02 23600 704 97% 6053 61% /
/dev/hd03 10092 1192 88% 753 25% /procyon
/dev/hd01 11232 8346 25% 562 28% /procyon/tmp
2. To list information about the file system on a diskette:
df /dev/fd0
3. To list information about the file system normally mounted as /diskette0:
df /diskette0
FILES
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/etc/filesystems Lists the known file systems and defines their
characteristics.
RELATED INFORMATION
See the following commands: "fsck, dfsck."
See the filesystem file in AIX Operating System Technical Reference.
See discussion of the df command in Managing the AIX Operating System.
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