Scenario: Calculate disk space when moving a disk unit

In the following scenario, you are planning to remove a disk unit from a disk pool. Before the disk unit is removed from the source disk pool, the data on the disk unit is copied to the other disk units in the source disk pool. You need to ensure that you have sufficient free space on your source disk pool for this data.

Assume that you have 180 GB of used space, 40 GB of free space, the threshold is set to 90%, and the disk unit you are removing from the disk pool has a capacity of 18 GB.

Perform the scenario as follows:

1. Using the disk space calculator on the Capacity tab of the Disk Pools Properties dialog, enter these values and click Calculate.

   A graphical representation of the used and free space on your system appears along with the total disk space, the percent used, and your threshold.

2. From the disk space calculator, select Remove Disk Space from Disk Pool and enter 18 for the amount. Click Calculate.

   The graphical representation is redrawn based on the revised values for used and free space after the 18 GB to be removed is removed from the system.

The percentage of disk space used is now 89.1%. This number just fits under your threshold, but not by much.