IBM Midrange System DS4000 Series Hardware Manual page 204

To start configuring hot spares, from the Setup view of the your Subsystem management
window, select Configure Storage Subsystem, as shown in Figure 4-49.
Figure 4-49 Configuring hot spares
Select Configure hot spare drives. The window shown in Figure 4-50 opens.
Figure 4-50 Hot Spare Drive Options
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IBM Midrange System Storage Hardware Guide