-a
Displays only summary information of the Gfarm file system.
-h
Displays numbers in human readable format by adding a prefix multiplier symbol like "M" (mega). Since this option uses powers of 1024, "M" means 1,048,576.
-H
Displays numbers in human readable format by adding a prefix multiplier symbol like "M" (mega). Since this option uses powers of 1000, "M" means 1,000,000.
-n
Displays hostnames of available Gfarm file system nodes.
-r
Sort output in the reverse order.
-S
Sort output in the increasing order of the available disk capacity.
-P
path
Specifies a path name to specify a metadata server instead of the root metadata server. Note that this option is not effective with the -a option.
-D
domainname
Specifies a domain name of filesystem nodes to list the status of disk free space.
-R
Displays real disk spaces even if some Gfarm file system nodes are readonly. Please see also the following NOTES.
-?
Displays a list of command options.
Filesystem nodes may be changed to a read-only mode by the gfhost command. The read-only filesystem nodes are internally treated as disk full not to create a new file. That is why gfdf shows these read-only filesystem nodes have no available capacity. With the -R option, gfdf shows the real disk usage. The -a option is not affected by this behavior, which shows the real disk usage always.