The difference between the two calculations is the capacity reserved for superuser. If a file system has a reserved capacity, the total capacity from the df -kcommand and Capacity Manager will differ.

For example, assume you run the df -kcommand for the file system /dev/dsk/c0t0d0s0. After you run the df -kcommand, you notice that the total capacity displayed is 6688076 KB. When you look at Capacity Manager, the total capacity displayed is 6621196 KB. Actually, Capacity Manager displays results in megabytes, but for this example, it is easier to have the totals using the same units.

The totals differ. How does this happen? When you run the df -kcommand, the computer runs the equation mentioned earlier (used capacity + available capacity + reserved

capacity):

1904031 KB + 4717165 KB + 66880 KB = 6688076 KB

where

•1904031 KB is the used capacity

•4717165 KB is the available capacity

•66880 KB is the capacity reserved for the superuser. The percentage of the reserved capacity can be set when using the newfs -mcommand.

Capacity Manager calculates the total capacity by using the equation discussed previously (used capacity + available capacity) and displaying the result in megabytes:

1904031 KB + 4717165 KB = 6621196 KB

where

•1904031 KB is the used capacity

•4717165 KB is the available capacity

Because Capacity Manager does not include the reserved capacity in its calculations, the difference between the two calculations is the capacity reserved for the superuser, which is 66880 KB.

370 Finding an Element’s Storage Capacity