df_vxfs - report number of free disk blocks and inodes for a VERITAS File System


df [-F vxfs] [generic_options] [-o s] [directory | special . . .]


The df command prints out the number of free blocks and free inodes in vxfs file systems or directories by examining the counts kept in the super-blocks.

Extents smaller than 8K may not be usable for all types of allocation, so df does not count free blocks in extents below 8K when reporting the total number of free blocks.

Starting with VxFS 2.0, inodes are dynamically allocated from a pool of free blocks. The number of free inodes and blocks reported by df is an estimate based on the number of free 8K (or larger) extents and the current ratio of allocated inodes to allocated blocks. Allocating additional blocks may therefore decrease the count of free inodes and vice versa.

The special device name (for example, /dev/dsk/c0b0t1d0s5) or mount point directory name (for example, /mnt) must be specified. If directory is a directory name, the report presents information for the device that contains the directory.


Supported by the generic df command (see df(1M)).

-F vxfs
Specify the vxfs file system type. If -F vxfs is not specified heuristics similiar to those used by fstyp(1M) are used to determine the file system type.
This command executes faster if it is not required to autodetect file system types. If possible, specify -F vxfs

Specify vxfs file system specific options. The following option is available:

Print the number of free extents of each size. Free extents are always an integral power of 2 in length, ranging from a minimum of 1 block to the maximum extent size supported by the filesystem.




df(1M), fs_vxfs(4), fstyp(1M)

© 1997 The Santa Cruz Operation, Inc. All rights reserved.