If a pathname is specified, df will report only on the corresponding volume; otherwise, it will report on every online volume in the system.
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 na_snap(1)), 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.
toaster> df Filesystem kbytes used avail capacityMounted on /vol/root 4339168 1777824 2561344 41% /vol/root /vol/root/.snapshot 1084788 956716 128072 88% /vol/root/.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 volume's snapshot schedule (using snap schedule) to reduce the number of snapshots that are kept on line.
Show file system inode usage:
Data ONTAP 5.0 Last change: 7 August 1997 1 User Commands na_df(1) toaster> df -i Filesystem iused ifree %iusedMounted on /vol/root 164591 14313 92% /vol/root
The number of inodes in the file system can be increased at any time using the maxfiles command (see maxfiles(1)).