Command ReferenceA-23
NAME
df - display free disk space
SYNOP SIS
df [ -i ] [ pathname ]
DESCRIPTION
df displays statistics about the amount of free disk space in one or all volumes on
the filer. All sizes are reported in 1024-byte blocks.
The pathname parameter is the path name to a volume. If it is specified, df
reports only on the corresponding volume; otherwise, it reports on every on-line
volume.
For each volume, df displays statistics about snapshots on a separate line from
statistics about the active file system. The snapshot line reports the amount of
space consumed by all the snapshots in the system. Blocks that are referenced
by both the active file system and by one or more snapshots are counted only in
the active file system line, not in the snapshot line.
If snapshots consume more space than has been reserved for them by the snap
reserve command (see snap), then the excess space consumed by snapshots is
reported as used by the active file system as well as by snapshots. In this case, it
may appear that more blocks have been used in total than are actually present in
the file system.
With the -i option, df displays statistics on the number of free inodes.
EXAMPLES
The following example shows file system disk space usage:
filer> df
Filesystem kbytes used avail capacity Mounted on
/vol/vol0 4339168 1777824 2561344 41% /vol/vol0
/vol/vol0/.snapshot 1084788 956716 128072 88% /vol/vol0/.snapshot
If snapshots consume more than 100% of the space reserved for them, then
either the snapshot reserve should be increased (using snap reserve) or else
some of the snapshots should be deleted (using snap delete). After deleting
some snapshots, it may make sense to alter the volumeî‚’s snapshot schedule
(using snap schedule) to reduce the number of snapshots that are kept on line.
The following example shows file system inode usage for a specified volume:
filer df -i /vol/vol0
Filesystem iused ifree %iused Mounted on
/vol/vol0 164591 14313 92% /vol/vol0
You can increase the number of inodes in a file system at any time using the
maxfiles command (see maxfiles).
df